13530432331 has 32 divisors (see below), whose sum is σ = 15177964032. Its totient is φ = 11981813760.

The previous prime is 13530432269. The next prime is 13530432337. The reversal of 13530432331 is 13323403531.

It is a cyclic number.

It is not a de Polignac number, because 13530432331 - 2⁹ = 13530431819 is a prime.

It is a super-2 number, since 2×13530432331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13530432331.

It is not an unprimeable number, because it can be changed into a prime (13530432337) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8953866 + ... + 8955376.

It is an arithmetic number, because the mean of its divisors is an integer number (474311376).

Almost surely, 2^13530432331 is an apocalyptic number.

13530432331 is a deficient number, since it is larger than the sum of its proper divisors (1647531701).

13530432331 is a wasteful number, since it uses less digits than its factorization.

13530432331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843.

The product of its (nonzero) digits is 9720, while the sum is 28.

Adding to 13530432331 its reverse (13323403531), we get a palindrome (26853835862).

The spelling of 13530432331 in words is "thirteen billion, five hundred thirty million, four hundred thirty-two thousand, three hundred thirty-one".