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30213231 = 317956263
BaseRepresentation
bin111001101000…
…0010001101111
32002211222202120
41303100101233
530213310411
62555324023
7514544136
oct163202157
962758676
1030213231
1116066714
12a150613
13634b069
14402691d
1529bc106
hex1cd046f

30213231 has 8 divisors (see below), whose sum is σ = 40510080. Its totient is φ = 20029272.

The previous prime is 30213217. The next prime is 30213247. The reversal of 30213231 is 13231203.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30213231 - 29 = 30212719 is a prime.

It is a super-2 number, since 2×302132312 = 1825678654918722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30213231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30213431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27595 + ... + 28668.

It is an arithmetic number, because the mean of its divisors is an integer number (5063760).

Almost surely, 230213231 is an apocalyptic number.

30213231 is a deficient number, since it is larger than the sum of its proper divisors (10296849).

30213231 is a wasteful number, since it uses less digits than its factorization.

30213231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56445.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 30213231 is about 5496.6563472715. The cubic root of 30213231 is about 311.4576891605.

Adding to 30213231 its reverse (13231203), we get a palindrome (43444434).

The spelling of 30213231 in words is "thirty million, two hundred thirteen thousand, two hundred thirty-one".

Divisors: 1 3 179 537 56263 168789 10071077 30213231