220999975 has 24 divisors (see below), whose sum is σ = 314076128. Its totient is φ = 151113600.

The previous prime is 220999973. The next prime is 220999979. The reversal of 220999975 is 579999022.

It is not a de Polignac number, because 220999975 - 2¹ = 220999973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220999973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67885 + ... + 71065.

Almost surely, 2^220999975 is an apocalyptic number.

220999975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

220999975 is a deficient number, since it is larger than the sum of its proper divisors (93076153).

220999975 is a wasteful number, since it uses less digits than its factorization.

220999975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3595 (or 3590 counting only the distinct ones).

The product of its (nonzero) digits is 918540, while the sum is 52.

The square root of 220999975 is about 14866.0679064775. The cubic root of 220999975 is about 604.5943368036.

The spelling of 220999975 in words is "two hundred twenty million, nine hundred ninety-nine thousand, nine hundred seventy-five".