1515113421231 has 16 divisors (see below), whose sum is σ = 2031751244160. Its totient is φ = 1004277352800.

The previous prime is 1515113421209. The next prime is 1515113421259. The reversal of 1515113421231 is 1321243115151.

It is not a de Polignac number, because 1515113421231 - 2²² = 1515109226927 is a prime.

It is a super-2 number, since 2×1515113421231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1515113421431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3309381 + ... + 3739281.

It is an arithmetic number, because the mean of its divisors is an integer number (126984452760).

Almost surely, 2^{1515113421231} is an apocalyptic number.

1515113421231 is a deficient number, since it is larger than the sum of its proper divisors (516637822929).

1515113421231 is a wasteful number, since it uses less digits than its factorization.

1515113421231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436646.

The product of its digits is 3600, while the sum is 30.

Adding to 1515113421231 its reverse (1321243115151), we get a palindrome (2836356536382).

The spelling of 1515113421231 in words is "one trillion, five hundred fifteen billion, one hundred thirteen million, four hundred twenty-one thousand, two hundred thirty-one".