556720351 has 8 divisors (see below), whose sum is σ = 626923008. Its totient is φ = 489783000.

The previous prime is 556720303. The next prime is 556720357. The reversal of 556720351 is 153027655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 556720351 - 2¹¹ = 556718303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556720357) 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, 815965 + ... + 816646.

It is an arithmetic number, because the mean of its divisors is an integer number (78365376).

Almost surely, 2^556720351 is an apocalyptic number.

556720351 is a deficient number, since it is larger than the sum of its proper divisors (70202657).

556720351 is a wasteful number, since it uses less digits than its factorization.

556720351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632653.

The product of its (nonzero) digits is 31500, while the sum is 34.

The square root of 556720351 is about 23594.9221443937. The cubic root of 556720351 is about 822.6448169049.

The spelling of 556720351 in words is "five hundred fifty-six million, seven hundred twenty thousand, three hundred fifty-one".