3133388921 has 8 divisors (see below), whose sum is σ = 3393064584. Its totient is φ = 2876376960.

The previous prime is 3133388917. The next prime is 3133388939. The reversal of 3133388921 is 1298833313.

It can be written as a sum of positive squares in 4 ways, for example, as 20976400 + 3112412521 = 4580^2 + 55789^2 .

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 3133388921 - 2² = 3133388917 is a prime.

It is a super-2 number, since 2×3133388921² = 19636252260491088482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3133388981) 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, 663476 + ... + 668181.

It is an arithmetic number, because the mean of its divisors is an integer number (424133073).

Almost surely, 2^3133388921 is an apocalyptic number.

It is an amenable number.

3133388921 is a deficient number, since it is larger than the sum of its proper divisors (259675663).

3133388921 is a wasteful number, since it uses less digits than its factorization.

3133388921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331851.

The product of its digits is 93312, while the sum is 41.

The square root of 3133388921 is about 55976.6819398935. The cubic root of 3133388921 is about 1463.3159324222.

The spelling of 3133388921 in words is "three billion, one hundred thirty-three million, three hundred eighty-eight thousand, nine hundred twenty-one".