50640131 has 2 divisors, whose sum is σ = 50640132. Its totient is φ = 50640130.

The previous prime is 50640097. The next prime is 50640133. The reversal of 50640131 is 13104605.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50640131 is a prime.

It is a super-2 number, since 2×50640131² = 5128845735394322, which contains 22 as substring.

Together with 50640133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (50640133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25320065 + 25320066.

It is an arithmetic number, because the mean of its divisors is an integer number (25320066).

Almost surely, 2^50640131 is an apocalyptic number.

50640131 is a deficient number, since it is larger than the sum of its proper divisors (1).

50640131 is an equidigital number, since it uses as much as digits as its factorization.

50640131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 50640131 is about 7116.1879542350. The cubic root of 50640131 is about 369.9686630387.

Adding to 50640131 its reverse (13104605), we get a palindrome (63744736).

The spelling of 50640131 in words is "fifty million, six hundred forty thousand, one hundred thirty-one".