55530270 has 48 divisors (see below), whose sum is σ = 146549520. Its totient is φ = 14585472.

The previous prime is 55530263. The next prime is 55530281. The reversal of 55530270 is 7203555.

It is a super-2 number, since 2×55530270² = 6167221772545800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1426 + ... + 10634.

It is an arithmetic number, because the mean of its divisors is an integer number (3053115).

Almost surely, 2^55530270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55530270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73274760).

55530270 is an abundant number, since it is smaller than the sum of its proper divisors (91019250).

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

55530270 is a wasteful number, since it uses less digits than its factorization.

55530270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9289 (or 9286 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 27.

The square root of 55530270 is about 7451.8635253204. The cubic root of 55530270 is about 381.5135159285.

The spelling of 55530270 in words is "fifty-five million, five hundred thirty thousand, two hundred seventy".