56221418 has 24 divisors (see below), whose sum is σ = 97109280. Its totient is φ = 24206760.

The previous prime is 56221409. The next prime is 56221427. The reversal of 56221418 is 81412265.

It is an interprime number because it is at equal distance from previous prime (56221409) and next prime (56221427).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4403 + ... + 11481.

It is an arithmetic number, because the mean of its divisors is an integer number (4046220).

Almost surely, 2^56221418 is an apocalyptic number.

56221418 is a deficient number, since it is larger than the sum of its proper divisors (40887862).

56221418 is a wasteful number, since it uses less digits than its factorization.

56221418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7130 (or 7111 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

The square root of 56221418 is about 7498.0942912183. The cubic root of 56221418 is about 383.0898084427.

The spelling of 56221418 in words is "fifty-six million, two hundred twenty-one thousand, four hundred eighteen".