221375708 has 6 divisors (see below), whose sum is σ = 387407496. Its totient is φ = 110687852.

The previous prime is 221375689. The next prime is 221375711. The reversal of 221375708 is 807573122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27671960 + ... + 27671967.

It is an arithmetic number, because the mean of its divisors is an integer number (64567916).

Almost surely, 2^221375708 is an apocalyptic number.

It is an amenable number.

221375708 is a deficient number, since it is larger than the sum of its proper divisors (166031788).

221375708 is a wasteful number, since it uses less digits than its factorization.

221375708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55343931 (or 55343929 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 221375708 is about 14878.6998087871. The cubic root of 221375708 is about 604.9367763999.

The spelling of 221375708 in words is "two hundred twenty-one million, three hundred seventy-five thousand, seven hundred eight".