56111921 has 8 divisors (see below), whose sum is σ = 59138400. Its totient is φ = 53092800.

The previous prime is 56111911. The next prime is 56111941. The reversal of 56111921 is 12911165.

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 56111921 - 2⁶ = 56111857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56111911) 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, 21590 + ... + 24048.

It is an arithmetic number, because the mean of its divisors is an integer number (7392300).

Almost surely, 2^56111921 is an apocalyptic number.

It is an amenable number.

56111921 is a deficient number, since it is larger than the sum of its proper divisors (3026479).

56111921 is a wasteful number, since it uses less digits than its factorization.

56111921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3679.

The product of its digits is 540, while the sum is 26.

The square root of 56111921 is about 7490.7890772602. The cubic root of 56111921 is about 382.8409445286.

The spelling of 56111921 in words is "fifty-six million, one hundred eleven thousand, nine hundred twenty-one".