13215412631 has 4 divisors (see below), whose sum is σ = 13343717712. Its totient is φ = 13087107552.

The previous prime is 13215412601. The next prime is 13215412663. The reversal of 13215412631 is 13621451231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13621451231 = 6599 ⋅2064169.

It is a cyclic number.

It is not a de Polignac number, because 13215412631 - 2¹⁰ = 13215411607 is a prime.

It is a super-2 number, since 2×13215412631² (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 = 13215412594 and 13215412603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13215412601) 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, 64152386 + ... + 64152591.

It is an arithmetic number, because the mean of its divisors is an integer number (3335929428).

Almost surely, 2^13215412631 is an apocalyptic number.

13215412631 is a deficient number, since it is larger than the sum of its proper divisors (128305081).

13215412631 is a wasteful number, since it uses less digits than its factorization.

13215412631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128305080.

The product of its digits is 4320, while the sum is 29.

Adding to 13215412631 its reverse (13621451231), we get a palindrome (26836863862).

The spelling of 13215412631 in words is "thirteen billion, two hundred fifteen million, four hundred twelve thousand, six hundred thirty-one".