56705303021 has 4 divisors (see below), whose sum is σ = 57235259232. Its totient is φ = 56175346812.

The previous prime is 56705302987. The next prime is 56705303051. The reversal of 56705303021 is 12030350765.

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 56705303021 - 2⁶ = 56705302957 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 (56705303051) 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, 264977945 + ... + 264978158.

It is an arithmetic number, because the mean of its divisors is an integer number (14308814808).

Almost surely, 2^56705303021 is an apocalyptic number.

It is an amenable number.

56705303021 is a deficient number, since it is larger than the sum of its proper divisors (529956211).

56705303021 is a wasteful number, since it uses less digits than its factorization.

56705303021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529956210.

The product of its (nonzero) digits is 18900, while the sum is 32.

Adding to 56705303021 its reverse (12030350765), we get a palindrome (68735653786).

The spelling of 56705303021 in words is "fifty-six billion, seven hundred five million, three hundred three thousand, twenty-one".