221163942 has 32 divisors (see below), whose sum is σ = 449648640. Its totient is φ = 72511200.

The previous prime is 221163941. The next prime is 221163949. The reversal of 221163942 is 249361122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221163941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97659 + ... + 99897.

It is an arithmetic number, because the mean of its divisors is an integer number (14051520).

Almost surely, 2^221163942 is an apocalyptic number.

221163942 is an abundant number, since it is smaller than the sum of its proper divisors (228484698).

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

221163942 is a wasteful number, since it uses less digits than its factorization.

221163942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2508.

The product of its digits is 5184, while the sum is 30.

The square root of 221163942 is about 14871.5816912661. The cubic root of 221163942 is about 604.7438225112.

The spelling of 221163942 in words is "two hundred twenty-one million, one hundred sixty-three thousand, nine hundred forty-two".