13531145331 has 16 divisors (see below), whose sum is σ = 19975425408. Its totient is φ = 8078294400.

The previous prime is 13531145311. The next prime is 13531145371. The reversal of 13531145331 is 13354113531.

It is not a de Polignac number, because 13531145331 - 2⁹ = 13531144819 is a prime.

It is a super-2 number, since 2×13531145331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13531145311) 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, 3057750 + ... + 3062171.

It is an arithmetic number, because the mean of its divisors is an integer number (1248464088).

Almost surely, 2^13531145331 is an apocalyptic number.

13531145331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13531145331 is a deficient number, since it is larger than the sum of its proper divisors (6444280077).

13531145331 is a wasteful number, since it uses less digits than its factorization.

13531145331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6120002.

The product of its digits is 8100, while the sum is 30.

Adding to 13531145331 its reverse (13354113531), we get a palindrome (26885258862).

The spelling of 13531145331 in words is "thirteen billion, five hundred thirty-one million, one hundred forty-five thousand, three hundred thirty-one".