56203297921 has 8 divisors (see below), whose sum is σ = 56703282624. Its totient is φ = 55704994800.

The previous prime is 56203297901. The next prime is 56203297991. The reversal of 56203297921 is 12979230265.

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 56203297921 - 2⁵ = 56203297889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56203297901) 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, 353206 + ... + 486991.

It is an arithmetic number, because the mean of its divisors is an integer number (7087910328).

Almost surely, 2^56203297921 is an apocalyptic number.

56203297921 is the 126721-st centered heptagonal number.

It is an amenable number.

56203297921 is a deficient number, since it is larger than the sum of its proper divisors (499984703).

56203297921 is a wasteful number, since it uses less digits than its factorization.

56203297921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840791.

The product of its (nonzero) digits is 408240, while the sum is 46.

The spelling of 56203297921 in words is "fifty-six billion, two hundred three million, two hundred ninety-seven thousand, nine hundred twenty-one".