2149231257 has 6 divisors (see below), whose sum is σ = 3104445162. Its totient is φ = 1432820832.

The previous prime is 2149231237. The next prime is 2149231309. The reversal of 2149231257 is 7521329412.

It can be written as a sum of positive squares in only one way, i.e., 2129730201 + 19501056 = 46149^2 + 4416^2 .

It is not a de Polignac number, because 2149231257 - 2¹⁰ = 2149230233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2149231207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119401728 + ... + 119401745.

It is an arithmetic number, because the mean of its divisors is an integer number (517407527).

Almost surely, 2^2149231257 is an apocalyptic number.

It is an amenable number.

2149231257 is a deficient number, since it is larger than the sum of its proper divisors (955213905).

2149231257 is a wasteful number, since it uses less digits than its factorization.

2149231257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238803479 (or 238803476 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 2149231257 is about 46359.8021673950. The cubic root of 2149231257 is about 1290.5090347310.

The spelling of 2149231257 in words is "two billion, one hundred forty-nine million, two hundred thirty-one thousand, two hundred fifty-seven".