55225380 has 48 divisors (see below), whose sum is σ = 176722560. Its totient is φ = 12622848.

The previous prime is 55225361. The next prime is 55225393. The reversal of 55225380 is 8352255.

It is a super-2 number, since 2×55225380² = 6099685192288800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65325 + ... + 66164.

It is an arithmetic number, because the mean of its divisors is an integer number (3681720).

Almost surely, 2^55225380 is an apocalyptic number.

It is an amenable number.

55225380 is an abundant number, since it is smaller than the sum of its proper divisors (121497180).

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

55225380 is a wasteful number, since it uses less digits than its factorization.

55225380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131508 (or 131506 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 55225380 is about 7431.3780687030. The cubic root of 55225380 is about 380.8139983938.

The spelling of 55225380 in words is "fifty-five million, two hundred twenty-five thousand, three hundred eighty".