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30200431 = 31396487
BaseRepresentation
bin111001100110…
…1001001101111
32002211100012111
41303031021233
530212403211
62555144451
7514461622
oct163151157
962740174
1030200431
1116058038
12a145127
1363452a1
144021db9
1529b8421
hex1ccd26f

30200431 has 4 divisors (see below), whose sum is σ = 30297232. Its totient is φ = 30103632.

The previous prime is 30200419. The next prime is 30200441. The reversal of 30200431 is 13400203.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13400203 = 22515953.

It is a cyclic number.

It is not a de Polignac number, because 30200431 - 29 = 30199919 is a prime.

It is a super-2 number, since 2×302004312 = 1824132065171522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30200411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47931 + ... + 48556.

It is an arithmetic number, because the mean of its divisors is an integer number (7574308).

Almost surely, 230200431 is an apocalyptic number.

30200431 is a deficient number, since it is larger than the sum of its proper divisors (96801).

30200431 is an equidigital number, since it uses as much as digits as its factorization.

30200431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96800.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 30200431 is about 5495.4918797138. The cubic root of 30200431 is about 311.4136993652.

Adding to 30200431 its reverse (13400203), we get a palindrome (43600634).

The spelling of 30200431 in words is "thirty million, two hundred thousand, four hundred thirty-one".

Divisors: 1 313 96487 30200431