651331061 has 2 divisors, whose sum is σ = 651331062. Its totient is φ = 651331060.

The previous prime is 651331033. The next prime is 651331069. The reversal of 651331061 is 160133156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 571496836 + 79834225 = 23906^2 + 8935^2 .

It is a cyclic number.

It is not a de Polignac number, because 651331061 - 2²² = 647136757 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 651331061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651331069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325665530 + 325665531.

It is an arithmetic number, because the mean of its divisors is an integer number (325665531).

Almost surely, 2^651331061 is an apocalyptic number.

It is an amenable number.

651331061 is a deficient number, since it is larger than the sum of its proper divisors (1).

651331061 is an equidigital number, since it uses as much as digits as its factorization.

651331061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 651331061 is about 25521.1884715426. The cubic root of 651331061 is about 866.8299930023.

The spelling of 651331061 in words is "six hundred fifty-one million, three hundred thirty-one thousand, sixty-one".