1331920501 has 32 divisors (see below), whose sum is σ = 1495203840. Its totient is φ = 1180738944.

The previous prime is 1331920493. The next prime is 1331920517. The reversal of 1331920501 is 1050291331.

It is a cyclic number.

It is not a de Polignac number, because 1331920501 - 2³ = 1331920493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331920531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5716281 + ... + 5716513.

It is an arithmetic number, because the mean of its divisors is an integer number (46725120).

Almost surely, 2^1331920501 is an apocalyptic number.

It is an amenable number.

1331920501 is a deficient number, since it is larger than the sum of its proper divisors (163283339).

1331920501 is a wasteful number, since it uses less digits than its factorization.

1331920501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 1331920501 is about 36495.4860359470. The cubic root of 1331920501 is about 1100.2535231073.

The spelling of 1331920501 in words is "one billion, three hundred thirty-one million, nine hundred twenty thousand, five hundred one".