13525313431 has 4 divisors (see below), whose sum is σ = 15457501072. Its totient is φ = 11593125792.

The previous prime is 13525313387. The next prime is 13525313443. The reversal of 13525313431 is 13431352531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13431352531 = 179 ⋅75035489.

It is a cyclic number.

It is not a de Polignac number, because 13525313431 - 2⁷ = 13525313303 is a prime.

It is a super-2 number, since 2×13525313431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13525313393 and 13525313402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13525313471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 966093810 + ... + 966093823.

It is an arithmetic number, because the mean of its divisors is an integer number (3864375268).

Almost surely, 2^13525313431 is an apocalyptic number.

13525313431 is a deficient number, since it is larger than the sum of its proper divisors (1932187641).

13525313431 is an equidigital number, since it uses as much as digits as its factorization.

13525313431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932187640.

The product of its digits is 16200, while the sum is 31.

Adding to 13525313431 its reverse (13431352531), we get a palindrome (26956665962).

The spelling of 13525313431 in words is "thirteen billion, five hundred twenty-five million, three hundred thirteen thousand, four hundred thirty-one".