231515520231214 has 16 divisors (see below), whose sum is σ = 351196261542000. Its totient is φ = 114450255526464.

The previous prime is 231515520231211. The next prime is 231515520231239. The reversal of 231515520231214 is 412132025515132.

It is a happy number.

It is a super-2 number, since 2×231515520231214² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231515520231211) 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, 35971497 + ... + 41916340.

It is an arithmetic number, because the mean of its divisors is an integer number (21949766346375).

Almost surely, 2^{231515520231214} is an apocalyptic number.

231515520231214 is a deficient number, since it is larger than the sum of its proper divisors (119680741310786).

231515520231214 is a wasteful number, since it uses less digits than its factorization.

231515520231214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77904627.

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 231515520231214 its reverse (412132025515132), we get a palindrome (643647545746346).

The spelling of 231515520231214 in words is "two hundred thirty-one trillion, five hundred fifteen billion, five hundred twenty million, two hundred thirty-one thousand, two hundred fourteen".