15213534231 has 8 divisors (see below), whose sum is σ = 23182528384. Its totient is φ = 8693448120.

The previous prime is 15213534227. The next prime is 15213534247. The reversal of 15213534231 is 13243531251.

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

It is not a de Polignac number, because 15213534231 - 2² = 15213534227 is a prime.

It is a super-2 number, since 2×15213534231² (a number of 21 digits) 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 (15213534211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362226985 + ... + 362227026.

It is an arithmetic number, because the mean of its divisors is an integer number (2897816048).

Almost surely, 2^15213534231 is an apocalyptic number.

15213534231 is a deficient number, since it is larger than the sum of its proper divisors (7968994153).

15213534231 is an equidigital number, since it uses as much as digits as its factorization.

15213534231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724454021.

The product of its digits is 10800, while the sum is 30.

The spelling of 15213534231 in words is "fifteen billion, two hundred thirteen million, five hundred thirty-four thousand, two hundred thirty-one".