13631522421 has 8 divisors (see below), whose sum is σ = 19827669024. Its totient is φ = 8261528720.

The previous prime is 13631522419. The next prime is 13631522467. The reversal of 13631522421 is 12422513631.

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

It is a cyclic number.

It is not a de Polignac number, because 13631522421 - 2¹ = 13631522419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13631522921) 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, 206538186 + ... + 206538251.

It is an arithmetic number, because the mean of its divisors is an integer number (2478458628).

Almost surely, 2^13631522421 is an apocalyptic number.

13631522421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13631522421 is a deficient number, since it is larger than the sum of its proper divisors (6196146603).

13631522421 is a wasteful number, since it uses less digits than its factorization.

13631522421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413076451.

The product of its digits is 8640, while the sum is 30.

The spelling of 13631522421 in words is "thirteen billion, six hundred thirty-one million, five hundred twenty-two thousand, four hundred twenty-one".