221402342 has 32 divisors (see below), whose sum is σ = 384417792. Its totient is φ = 93678624.

The previous prime is 221402329. The next prime is 221402381. The reversal of 221402342 is 243204122.

221402342 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577883 + ... + 578265.

It is an arithmetic number, because the mean of its divisors is an integer number (12013056).

Almost surely, 2^221402342 is an apocalyptic number.

221402342 is a deficient number, since it is larger than the sum of its proper divisors (163015450).

221402342 is a wasteful number, since it uses less digits than its factorization.

221402342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 221402342 is about 14879.5948197523. The cubic root of 221402342 is about 604.9610356711.

Adding to 221402342 its reverse (243204122), we get a palindrome (464606464).

The spelling of 221402342 in words is "two hundred twenty-one million, four hundred two thousand, three hundred forty-two".