221990504 has 32 divisors (see below), whose sum is σ = 433002240. Its totient is φ = 106579200.

The previous prime is 221990501. The next prime is 221990507. The reversal of 221990504 is 405099122.

It is an interprime number because it is at equal distance from previous prime (221990501) and next prime (221990507).

It is not an unprimeable number, because it can be changed into a prime (221990501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29072 + ... + 35904.

It is an arithmetic number, because the mean of its divisors is an integer number (13531320).

Almost surely, 2^221990504 is an apocalyptic number.

It is an amenable number.

221990504 is a deficient number, since it is larger than the sum of its proper divisors (211011736).

221990504 is a wasteful number, since it uses less digits than its factorization.

221990504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7001 (or 6997 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 221990504 is about 14899.3457574485. The cubic root of 221990504 is about 605.4962610828.

The spelling of 221990504 in words is "two hundred twenty-one million, nine hundred ninety thousand, five hundred four".