651142931 has 2 divisors, whose sum is σ = 651142932. Its totient is φ = 651142930.

The previous prime is 651142927. The next prime is 651142981. The reversal of 651142931 is 139241156.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 651142931 - 2² = 651142927 is a prime.

It is a super-2 number, since 2×651142931² = 847974233182541522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (651142981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325571465 + 325571466.

It is an arithmetic number, because the mean of its divisors is an integer number (325571466).

Almost surely, 2^651142931 is an apocalyptic number.

651142931 is a deficient number, since it is larger than the sum of its proper divisors (1).

651142931 is an equidigital number, since it uses as much as digits as its factorization.

651142931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 32.

The square root of 651142931 is about 25517.5024444008. The cubic root of 651142931 is about 866.7465267797.

The spelling of 651142931 in words is "six hundred fifty-one million, one hundred forty-two thousand, nine hundred thirty-one".