220155440 has 40 divisors (see below), whose sum is σ = 541974240. Its totient is φ = 82881536.

The previous prime is 220155437. The next prime is 220155449. The reversal of 220155440 is 44551022.

It is a happy number.

220155440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (220155449) 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, 79580 + ... + 82299.

It is an arithmetic number, because the mean of its divisors is an integer number (13549356).

Almost surely, 2^220155440 is an apocalyptic number.

220155440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220155440 is an abundant number, since it is smaller than the sum of its proper divisors (321818800).

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

220155440 is a wasteful number, since it uses less digits than its factorization.

220155440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161909 (or 161903 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 220155440 is about 14837.6359302956. The cubic root of 220155440 is about 603.8232162478.

The spelling of 220155440 in words is "two hundred twenty million, one hundred fifty-five thousand, four hundred forty".