220187385 has 48 divisors (see below), whose sum is σ = 418099968. Its totient is φ = 106310400.

The previous prime is 220187377. The next prime is 220187419. The reversal of 220187385 is 583781022.

It is not a de Polignac number, because 220187385 - 2³ = 220187377 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 138304 + ... + 139886.

It is an arithmetic number, because the mean of its divisors is an integer number (8710416).

Almost surely, 2^220187385 is an apocalyptic number.

It is an amenable number.

220187385 is a deficient number, since it is larger than the sum of its proper divisors (197912583).

220187385 is a wasteful number, since it uses less digits than its factorization.

220187385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886 (or 1883 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 220187385 is about 14838.7123767529. The cubic root of 220187385 is about 603.8524201590.

It can be divided in two parts, 22018 and 7385, that added together give a triangular number (29403 = T₂₄₂).

The spelling of 220187385 in words is "two hundred twenty million, one hundred eighty-seven thousand, three hundred eighty-five".