63155220 has 48 divisors (see below), whose sum is σ = 179269440. Its totient is φ = 16609536.

The previous prime is 63155167. The next prime is 63155233. The reversal of 63155220 is 2255136.

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, 2830 + ... + 11589.

It is an arithmetic number, because the mean of its divisors is an integer number (3734780).

Almost surely, 2^63155220 is an apocalyptic number.

63155220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63155220 is an abundant number, since it is smaller than the sum of its proper divisors (116114220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63155220 is a wasteful number, since it uses less digits than its factorization.

63155220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14504 (or 14502 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 63155220 is about 7947.0258587726. The cubic root of 63155220 is about 398.2322407434.

The spelling of 63155220 in words is "sixty-three million, one hundred fifty-five thousand, two hundred twenty".