231133220115 has 32 divisors (see below), whose sum is σ = 423758830080. Its totient is φ = 105382093824.

The previous prime is 231133220111. The next prime is 231133220161. The reversal of 231133220115 is 511022331132.

It is a happy number.

It is not a de Polignac number, because 231133220115 - 2² = 231133220111 is a prime.

It is a super-2 number, since 2×231133220115² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231133220111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2864254 + ... + 2943843.

It is an arithmetic number, because the mean of its divisors is an integer number (13242463440).

Almost surely, 2^231133220115 is an apocalyptic number.

231133220115 is a deficient number, since it is larger than the sum of its proper divisors (192625609965).

231133220115 is a wasteful number, since it uses less digits than its factorization.

231133220115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5808491.

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 231133220115 its reverse (511022331132), we get a palindrome (742155551247).

The spelling of 231133220115 in words is "two hundred thirty-one billion, one hundred thirty-three million, two hundred twenty thousand, one hundred fifteen".