3157939381 has 12 divisors (see below), whose sum is σ = 3251858400. Its totient is φ = 3066663600.

The previous prime is 3157939373. The next prime is 3157939387. The reversal of 3157939381 is 1839397513.

It is a happy number.

It is not a de Polignac number, because 3157939381 - 2³ = 3157939373 is a prime.

It is a super-2 number, since 2×3157939381² = 19945162268141326322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3157939387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 818106 + ... + 821956.

It is an arithmetic number, because the mean of its divisors is an integer number (270988200).

Almost surely, 2^3157939381 is an apocalyptic number.

It is an amenable number.

3157939381 is a deficient number, since it is larger than the sum of its proper divisors (93919019).

3157939381 is an equidigital number, since it uses as much as digits as its factorization.

3157939381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4524 (or 4487 counting only the distinct ones).

The product of its digits is 612360, while the sum is 49.

The square root of 3157939381 is about 56195.5459178038. The cubic root of 3157939381 is about 1467.1277435057.

The spelling of 3157939381 in words is "three billion, one hundred fifty-seven million, nine hundred thirty-nine thousand, three hundred eighty-one".