56072021023 has 4 divisors (see below), whose sum is σ = 56316877240. Its totient is φ = 55827164808.

The previous prime is 56072020997. The next prime is 56072021041. The reversal of 56072021023 is 32012027065.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56072021023 is a prime.

It is a super-3 number, since 3×56072021023³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56072020982 and 56072021000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56072021053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122427765 + ... + 122428222.

It is an arithmetic number, because the mean of its divisors is an integer number (14079219310).

Almost surely, 2^56072021023 is an apocalyptic number.

56072021023 is a deficient number, since it is larger than the sum of its proper divisors (244856217).

56072021023 is a wasteful number, since it uses less digits than its factorization.

56072021023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244856216.

The product of its (nonzero) digits is 5040, while the sum is 28.

Adding to 56072021023 its reverse (32012027065), we get a palindrome (88084048088).

The spelling of 56072021023 in words is "fifty-six billion, seventy-two million, twenty-one thousand, twenty-three".