3149500021 has 16 divisors (see below), whose sum is σ = 3480811200. Its totient is φ = 2837818368.

The previous prime is 3149500007. The next prime is 3149500061. The reversal of 3149500021 is 1200059413.

It is a cyclic number.

It is not a de Polignac number, because 3149500021 - 2⁷ = 3149499893 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 (3149500061) 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, 5740 + ... + 79573.

It is an arithmetic number, because the mean of its divisors is an integer number (217550700).

Almost surely, 2^3149500021 is an apocalyptic number.

It is an amenable number.

3149500021 is a deficient number, since it is larger than the sum of its proper divisors (331311179).

3149500021 is a wasteful number, since it uses less digits than its factorization.

3149500021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85428.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 3149500021 is about 56120.4064579009. The cubic root of 3149500021 is about 1465.8196473331.

Adding to 3149500021 its reverse (1200059413), we get a palindrome (4349559434).

The spelling of 3149500021 in words is "three billion, one hundred forty-nine million, five hundred thousand, twenty-one".