221293190 has 32 divisors (see below), whose sum is σ = 432829440. Its totient is φ = 81151200.

The previous prime is 221293183. The next prime is 221293243. The reversal of 221293190 is 91392122.

221293190 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221293190² = 97941351880752200, which contains 22 as substring.

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, 12896 + ... + 24675.

It is an arithmetic number, because the mean of its divisors is an integer number (13525920).

Almost surely, 2^221293190 is an apocalyptic number.

221293190 is a deficient number, since it is larger than the sum of its proper divisors (211536250).

221293190 is a wasteful number, since it uses less digits than its factorization.

221293190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37628.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 221293190 is about 14875.9265257664. The cubic root of 221293190 is about 604.8616034778.

The spelling of 221293190 in words is "two hundred twenty-one million, two hundred ninety-three thousand, one hundred ninety".