131625731 has 2 divisors, whose sum is σ = 131625732. Its totient is φ = 131625730.

The previous prime is 131625719. The next prime is 131625737. The reversal of 131625731 is 137526131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131625731 is a prime.

It is a super-2 number, since 2×131625731² = 34650666122568722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 131625694 and 131625703.

It is not a weakly prime, because it can be changed into another prime (131625737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65812865 + 65812866.

It is an arithmetic number, because the mean of its divisors is an integer number (65812866).

Almost surely, 2^131625731 is an apocalyptic number.

131625731 is a deficient number, since it is larger than the sum of its proper divisors (1).

131625731 is an equidigital number, since it uses as much as digits as its factorization.

131625731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 29.

The square root of 131625731 is about 11472.8257635162. The cubic root of 131625731 is about 508.6826581315.

The spelling of 131625731 in words is "one hundred thirty-one million, six hundred twenty-five thousand, seven hundred thirty-one".