3131782713 has 6 divisors (see below), whose sum is σ = 4523686154. Its totient is φ = 2087855136.

The previous prime is 3131782699. The next prime is 3131782739. The reversal of 3131782713 is 3172871313.

3131782713 is a `hidden beast` number, since 313 + 1 + 78 + 271 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1783203984 + 1348578729 = 42228^2 + 36723^2 .

It is not a de Polignac number, because 3131782713 - 2¹³ = 3131774521 is a prime.

It is a super-2 number, since 2×3131782713² = 19616125922891280738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3131782763) 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, 173987920 + ... + 173987937.

Almost surely, 2^3131782713 is an apocalyptic number.

It is an amenable number.

3131782713 is a deficient number, since it is larger than the sum of its proper divisors (1391903441).

3131782713 is a wasteful number, since it uses less digits than its factorization.

3131782713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347975863 (or 347975860 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 3131782713 is about 55962.3329838919. The cubic root of 3131782713 is about 1463.0658526585.

The spelling of 3131782713 in words is "three billion, one hundred thirty-one million, seven hundred eighty-two thousand, seven hundred thirteen".