641514131 has 2 divisors, whose sum is σ = 641514132. Its totient is φ = 641514130.

The previous prime is 641514127. The next prime is 641514143. The reversal of 641514131 is 131415146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 641514131 - 2² = 641514127 is a prime.

It is a super-2 number, since 2×641514131² = 823080760545370322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641514131.

It is not a weakly prime, because it can be changed into another prime (641514101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320757065 + 320757066.

It is an arithmetic number, because the mean of its divisors is an integer number (320757066).

Almost surely, 2^641514131 is an apocalyptic number.

641514131 is a deficient number, since it is larger than the sum of its proper divisors (1).

641514131 is an equidigital number, since it uses as much as digits as its factorization.

641514131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 26.

The square root of 641514131 is about 25328.1292439848. The cubic root of 641514131 is about 862.4529441807.

Adding to 641514131 its reverse (131415146), we get a palindrome (772929277).

The spelling of 641514131 in words is "six hundred forty-one million, five hundred fourteen thousand, one hundred thirty-one".