651406331 has 2 divisors, whose sum is σ = 651406332. Its totient is φ = 651406330.

The previous prime is 651406321. The next prime is 651406337. The reversal of 651406331 is 133604156.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-651406331 is a prime.

It is a super-2 number, since 2×651406331² = 848660416133763122, 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 = 651406294 and 651406303.

It is not a weakly prime, because it can be changed into another prime (651406337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325703165 + 325703166.

It is an arithmetic number, because the mean of its divisors is an integer number (325703166).

Almost surely, 2^651406331 is an apocalyptic number.

651406331 is a deficient number, since it is larger than the sum of its proper divisors (1).

651406331 is an equidigital number, since it uses as much as digits as its factorization.

651406331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 651406331 is about 25522.6630859713. The cubic root of 651406331 is about 866.8633829757.

The spelling of 651406331 in words is "six hundred fifty-one million, four hundred six thousand, three hundred thirty-one".