651205051 has 8 divisors (see below), whose sum is σ = 759423200. Its totient is φ = 558175464.

The previous prime is 651205039. The next prime is 651205067. The reversal of 651205051 is 150502156.

It is not a de Polignac number, because 651205051 - 2⁷ = 651204923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651205021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948936 + ... + 949621.

It is an arithmetic number, because the mean of its divisors is an integer number (94927900).

Almost surely, 2^651205051 is an apocalyptic number.

651205051 is a deficient number, since it is larger than the sum of its proper divisors (108218149).

651205051 is an equidigital number, since it uses as much as digits as its factorization.

651205051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898578 (or 1898564 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 651205051 is about 25518.7196191345. The cubic root of 651205051 is about 866.7740888707.

The spelling of 651205051 in words is "six hundred fifty-one million, two hundred five thousand, fifty-one".