56213989 has 16 divisors (see below), whose sum is σ = 65457280. Its totient is φ = 47822400.

The previous prime is 56213981. The next prime is 56214017. The reversal of 56213989 is 98931265.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 56213989 - 2³ = 56213981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56213981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6064 + ... + 12214.

It is an arithmetic number, because the mean of its divisors is an integer number (4091080).

Almost surely, 2^56213989 is an apocalyptic number.

It is an amenable number.

56213989 is a deficient number, since it is larger than the sum of its proper divisors (9243291).

56213989 is a wasteful number, since it uses less digits than its factorization.

56213989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6220.

The product of its digits is 116640, while the sum is 43.

The square root of 56213989 is about 7497.5988823089. The cubic root of 56213989 is about 383.0729340933.

The spelling of 56213989 in words is "fifty-six million, two hundred thirteen thousand, nine hundred eighty-nine".