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33125213 = 113011383
BaseRepresentation
bin111111001011…
…1001101011101
32022022221020202
41332113031131
531440001323
63141553245
7551362652
oct176271535
968287222
1033125213
1117775510
12b115825
136b2a624
144583c29
152d94d28
hex1f9735d

33125213 has 4 divisors (see below), whose sum is σ = 36136608. Its totient is φ = 30113820.

The previous prime is 33125207. The next prime is 33125219. The reversal of 33125213 is 31252133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (33125207) and next prime (33125219).

It is not a de Polignac number, because 33125213 - 26 = 33125149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33125219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1505681 + ... + 1505702.

It is an arithmetic number, because the mean of its divisors is an integer number (9034152).

Almost surely, 233125213 is an apocalyptic number.

It is an amenable number.

33125213 is a deficient number, since it is larger than the sum of its proper divisors (3011395).

33125213 is a wasteful number, since it uses less digits than its factorization.

33125213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3011394.

The product of its digits is 540, while the sum is 20.

The square root of 33125213 is about 5755.4507208385. The cubic root of 33125213 is about 321.1586027953.

Adding to 33125213 its reverse (31252133), we get a palindrome (64377346).

Subtracting from 33125213 its reverse (31252133), we obtain a triangular number (1873080 = T1935).

The spelling of 33125213 in words is "thirty-three million, one hundred twenty-five thousand, two hundred thirteen".

Divisors: 1 11 3011383 33125213