56072881 has 4 divisors (see below), whose sum is σ = 56280064. Its totient is φ = 55865700.

The previous prime is 56072843. The next prime is 56072899. The reversal of 56072881 is 18827065.

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 56072881 - 2⁹ = 56072369 is a prime.

It is a super-2 number, since 2×56072881² = 6288335967280322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56072881.

It is not an unprimeable number, because it can be changed into a prime (56072801) 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, 103185 + ... + 103726.

It is an arithmetic number, because the mean of its divisors is an integer number (14070016).

Almost surely, 2^56072881 is an apocalyptic number.

It is an amenable number.

56072881 is a deficient number, since it is larger than the sum of its proper divisors (207183).

56072881 is a wasteful number, since it uses less digits than its factorization.

56072881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207182.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 56072881 is about 7488.1827568510. The cubic root of 56072881 is about 382.7521364357.

It can be divided in two parts, 56072 and 881, that added together give a triangular number (56953 = T₃₃₇).

The spelling of 56072881 in words is "fifty-six million, seventy-two thousand, eight hundred eighty-one".