13217890631 has 8 divisors (see below), whose sum is σ = 15046452864. Its totient is φ = 11493817720.

The previous prime is 13217890627. The next prime is 13217890649. The reversal of 13217890631 is 13609871231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13217890631 - 2² = 13217890627 is a prime.

It is a super-2 number, since 2×13217890631² (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 (13217890331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26122061 + ... + 26122566.

It is an arithmetic number, because the mean of its divisors is an integer number (1880806608).

Almost surely, 2^13217890631 is an apocalyptic number.

13217890631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13217890631 is a deficient number, since it is larger than the sum of its proper divisors (1828562233).

13217890631 is a wasteful number, since it uses less digits than its factorization.

13217890631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52244661.

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 13217890631 in words is "thirteen billion, two hundred seventeen million, eight hundred ninety thousand, six hundred thirty-one".