2506317731 has 2 divisors, whose sum is σ = 2506317732. Its totient is φ = 2506317730.

The previous prime is 2506317677. The next prime is 2506317743. The reversal of 2506317731 is 1377136052.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2506317731 is a prime.

It is a super-2 number, since 2×2506317731² = 12563257137449976722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2506317691 and 2506317700.

It is not a weakly prime, because it can be changed into another prime (2506317131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1253158865 + 1253158866.

It is an arithmetic number, because the mean of its divisors is an integer number (1253158866).

Almost surely, 2^2506317731 is an apocalyptic number.

2506317731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2506317731 is an equidigital number, since it uses as much as digits as its factorization.

2506317731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 2506317731 is about 50063.1374466283. The cubic root of 2506317731 is about 1358.3511106242.

The spelling of 2506317731 in words is "two billion, five hundred six million, three hundred seventeen thousand, seven hundred thirty-one".