13215255431 has 16 divisors (see below), whose sum is σ = 15208814400. Its totient is φ = 11248374528.

The previous prime is 13215255367. The next prime is 13215255437. The reversal of 13215255431 is 13455251231.

13215255431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 13215255431 - 2⁶ = 13215255367 is a prime.

It is a super-2 number, since 2×13215255431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13215255437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 612971 + ... + 634163.

It is an arithmetic number, because the mean of its divisors is an integer number (950550900).

Almost surely, 2^13215255431 is an apocalyptic number.

13215255431 is a deficient number, since it is larger than the sum of its proper divisors (1993558969).

13215255431 is a wasteful number, since it uses less digits than its factorization.

13215255431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21818.

The product of its digits is 18000, while the sum is 32.

The spelling of 13215255431 in words is "thirteen billion, two hundred fifteen million, two hundred fifty-five thousand, four hundred thirty-one".