10131681731 has 2 divisors, whose sum is σ = 10131681732. Its totient is φ = 10131681730.

The previous prime is 10131681713. The next prime is 10131681787. The reversal of 10131681731 is 13718613101.

Together with previous prime (10131681713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10131681731 is a prime.

It is a super-2 number, since 2×10131681731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10131681431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5065840865 + 5065840866.

It is an arithmetic number, because the mean of its divisors is an integer number (5065840866).

Almost surely, 2^10131681731 is an apocalyptic number.

10131681731 is a deficient number, since it is larger than the sum of its proper divisors (1).

10131681731 is an equidigital number, since it uses as much as digits as its factorization.

10131681731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 32.

The spelling of 10131681731 in words is "ten billion, one hundred thirty-one million, six hundred eighty-one thousand, seven hundred thirty-one".