56218974 has 48 divisors (see below), whose sum is σ = 133867008. Its totient is φ = 15685488.

The previous prime is 56218957. The next prime is 56218991. The reversal of 56218974 is 47981265.

It is an interprime number because it is at equal distance from previous prime (56218957) and next prime (56218991).

It is a super-2 number, since 2×56218974² = 6321146075225352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10419 + ... + 14865.

It is an arithmetic number, because the mean of its divisors is an integer number (2788896).

Almost surely, 2^56218974 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56218974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66933504).

56218974 is an abundant number, since it is smaller than the sum of its proper divisors (77648034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56218974 is a wasteful number, since it uses less digits than its factorization.

56218974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4509 (or 4502 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 56218974 is about 7497.9313147027. The cubic root of 56218974 is about 383.0842572661.

The spelling of 56218974 in words is "fifty-six million, two hundred eighteen thousand, nine hundred seventy-four".