651338257 has 2 divisors, whose sum is σ = 651338258. Its totient is φ = 651338256.

The previous prime is 651338251. The next prime is 651338279. The reversal of 651338257 is 752833156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 367718976 + 283619281 = 19176^2 + 16841^2 .

It is a cyclic number.

It is not a de Polignac number, because 651338257 - 2²³ = 642949649 is a prime.

It is not a weakly prime, because it can be changed into another prime (651338251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325669128 + 325669129.

It is an arithmetic number, because the mean of its divisors is an integer number (325669129).

Almost surely, 2^651338257 is an apocalyptic number.

It is an amenable number.

651338257 is a deficient number, since it is larger than the sum of its proper divisors (1).

651338257 is an equidigital number, since it uses as much as digits as its factorization.

651338257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 40.

The square root of 651338257 is about 25521.3294520485. The cubic root of 651338257 is about 866.8331852784.

The spelling of 651338257 in words is "six hundred fifty-one million, three hundred thirty-eight thousand, two hundred fifty-seven".