13515231401 has 24 divisors (see below), whose sum is σ = 16135187904. Its totient is φ = 11314472400.

The previous prime is 13515231383. The next prime is 13515231439. The reversal of 13515231401 is 10413251531.

It is not a de Polignac number, because 13515231401 - 2²² = 13511037097 is a prime.

It is a super-2 number, since 2×13515231401² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13515231481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 713351 + ... + 732051.

It is an arithmetic number, because the mean of its divisors is an integer number (672299496).

Almost surely, 2^13515231401 is an apocalyptic number.

It is an amenable number.

13515231401 is a deficient number, since it is larger than the sum of its proper divisors (2619956503).

13515231401 is an frugal number, since it uses more digits than its factorization.

13515231401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18779 (or 18751 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 13515231401 its reverse (10413251531), we get a palindrome (23928482932).

The spelling of 13515231401 in words is "thirteen billion, five hundred fifteen million, two hundred thirty-one thousand, four hundred one".