220228551 has 20 divisors (see below), whose sum is σ = 337879432. Its totient is φ = 142849008.

The previous prime is 220228529. The next prime is 220228553. The reversal of 220228551 is 155822022.

220228551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220228551 - 2⁹ = 220228039 is a prime.

It is a super-2 number, since 2×220228551² = 97001229351119202, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220228553) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 33745 + ... + 39738.

Almost surely, 2^220228551 is an apocalyptic number.

220228551 is a deficient number, since it is larger than the sum of its proper divisors (117650881).

220228551 is an equidigital number, since it uses as much as digits as its factorization.

220228551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73532 (or 73523 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 220228551 is about 14840.0994268906. The cubic root of 220228551 is about 603.8900496834.

The spelling of 220228551 in words is "two hundred twenty million, two hundred twenty-eight thousand, five hundred fifty-one".