221313942 has 12 divisors (see below), whose sum is σ = 479513580. Its totient is φ = 73771308.

The previous prime is 221313923. The next prime is 221313943. The reversal of 221313942 is 249313122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221313943) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6147592 + ... + 6147627.

It is an arithmetic number, because the mean of its divisors is an integer number (39959465).

Almost surely, 2^221313942 is an apocalyptic number.

221313942 is an abundant number, since it is smaller than the sum of its proper divisors (258199638).

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

221313942 is a wasteful number, since it uses less digits than its factorization.

221313942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12295227 (or 12295224 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 221313942 is about 14876.6240121877. The cubic root of 221313942 is about 604.8805100630.

The spelling of 221313942 in words is "two hundred twenty-one million, three hundred thirteen thousand, nine hundred forty-two".