231000802015 has 16 divisors (see below), whose sum is σ = 280776268800. Its totient is φ = 182418211872.

The previous prime is 231000801989. The next prime is 231000802061. The reversal of 231000802015 is 510208000132.

It is a cyclic number.

It is not a de Polignac number, because 231000802015 - 2⁷ = 231000801887 is a prime.

It is a super-2 number, since 2×231000802015² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1656366 + ... + 1790404.

It is an arithmetic number, because the mean of its divisors is an integer number (17548516800).

Almost surely, 2^231000802015 is an apocalyptic number.

231000802015 is a deficient number, since it is larger than the sum of its proper divisors (49775466785).

231000802015 is a wasteful number, since it uses less digits than its factorization.

231000802015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138486.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 231000802015 its reverse (510208000132), we get a palindrome (741208802147).

The spelling of 231000802015 in words is "two hundred thirty-one billion, eight hundred two thousand, fifteen".