56120287 has 4 divisors (see below), whose sum is σ = 56142000. Its totient is φ = 56098576.

The previous prime is 56120279. The next prime is 56120291. The reversal of 56120287 is 78202165.

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

It is a cyclic number.

It is not a de Polignac number, because 56120287 - 2³ = 56120279 is a prime.

It is a super-2 number, since 2×56120287² = 6298973225924738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56120227) 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, 6358 + ... + 12355.

It is an arithmetic number, because the mean of its divisors is an integer number (14035500).

Almost surely, 2^56120287 is an apocalyptic number.

56120287 is a deficient number, since it is larger than the sum of its proper divisors (21713).

56120287 is a wasteful number, since it uses less digits than its factorization.

56120287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21712.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 56120287 is about 7491.3474755881. The cubic root of 56120287 is about 382.8599701244.

The spelling of 56120287 in words is "fifty-six million, one hundred twenty thousand, two hundred eighty-seven".