220905625 has 20 divisors (see below), whose sum is σ = 276973840. Its totient is φ = 176130000.

The previous prime is 220905589. The next prime is 220905653. The reversal of 220905625 is 526509022.

It is not a de Polignac number, because 220905625 - 2¹³ = 220897433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 356566 + ... + 357184.

It is an arithmetic number, because the mean of its divisors is an integer number (13848692).

Almost surely, 2^220905625 is an apocalyptic number.

220905625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220905625 is a deficient number, since it is larger than the sum of its proper divisors (56068215).

220905625 is an frugal number, since it uses more digits than its factorization.

220905625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210 (or 1195 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 220905625 is about 14862.8942336276. The cubic root of 220905625 is about 604.5082861222.

The spelling of 220905625 in words is "two hundred twenty million, nine hundred five thousand, six hundred twenty-five".