56802021 has 4 divisors (see below), whose sum is σ = 75736032. Its totient is φ = 37868012.

The previous prime is 56802017. The next prime is 56802029. The reversal of 56802021 is 12020865.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56802021 - 2² = 56802017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56801982 and 56802000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56802029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9467001 + ... + 9467006.

It is an arithmetic number, because the mean of its divisors is an integer number (18934008).

Almost surely, 2^56802021 is an apocalyptic number.

It is an amenable number.

56802021 is a deficient number, since it is larger than the sum of its proper divisors (18934011).

56802021 is a wasteful number, since it uses less digits than its factorization.

56802021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18934010.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 56802021 is about 7536.7115508025. The cubic root of 56802021 is about 384.4040276049.

Adding to 56802021 its reverse (12020865), we get a palindrome (68822886).

The spelling of 56802021 in words is "fifty-six million, eight hundred two thousand, twenty-one".