131633253921 has 16 divisors (see below), whose sum is σ = 189271881344. Its totient is φ = 80893638144.

The previous prime is 131633253887. The next prime is 131633253923. The reversal of 131633253921 is 129352336131.

It is not a de Polignac number, because 131633253921 - 2¹⁴ = 131633237537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 131633253921.

It is not an unprimeable number, because it can be changed into a prime (131633253923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2292976 + ... + 2349681.

It is an arithmetic number, because the mean of its divisors is an integer number (11829492584).

Almost surely, 2^131633253921 is an apocalyptic number.

It is an amenable number.

131633253921 is a deficient number, since it is larger than the sum of its proper divisors (57638627423).

131633253921 is a wasteful number, since it uses less digits than its factorization.

131633253921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4643400.

The product of its digits is 87480, while the sum is 39.

The spelling of 131633253921 in words is "one hundred thirty-one billion, six hundred thirty-three million, two hundred fifty-three thousand, nine hundred twenty-one".