56221698 has 16 divisors (see below), whose sum is σ = 121093056. Its totient is φ = 17298960.

The previous prime is 56221673. The next prime is 56221699. The reversal of 56221698 is 89612265.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (56221699) 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, 360318 + ... + 360473.

It is an arithmetic number, because the mean of its divisors is an integer number (7568316).

Almost surely, 2^56221698 is an apocalyptic number.

56221698 is an abundant number, since it is smaller than the sum of its proper divisors (64871358).

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

56221698 is a wasteful number, since it uses less digits than its factorization.

56221698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720809.

The product of its digits is 51840, while the sum is 39.

The square root of 56221698 is about 7498.1129626060. The cubic root of 56221698 is about 383.0904444101.

The spelling of 56221698 in words is "fifty-six million, two hundred twenty-one thousand, six hundred ninety-eight".