221700942 has 16 divisors (see below), whose sum is σ = 492668880. Its totient is φ = 73900296.

The previous prime is 221700931. The next prime is 221700943. The reversal of 221700942 is 249007122.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221700943) 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, 2052733 + ... + 2052840.

It is an arithmetic number, because the mean of its divisors is an integer number (30791805).

Almost surely, 2^221700942 is an apocalyptic number.

221700942 is an abundant number, since it is smaller than the sum of its proper divisors (270967938).

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

221700942 is a wasteful number, since it uses less digits than its factorization.

221700942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4105584 (or 4105578 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 221700942 is about 14889.6253142918. The cubic root of 221700942 is about 605.2328789520.

The spelling of 221700942 in words is "two hundred twenty-one million, seven hundred thousand, nine hundred forty-two".