55251552 has 48 divisors (see below), whose sum is σ = 146128752. Its totient is φ = 18278400.

The previous prime is 55251541. The next prime is 55251557. The reversal of 55251552 is 25515255.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55251557) 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, 11052 + ... + 15252.

It is an arithmetic number, because the mean of its divisors is an integer number (3044349).

Almost surely, 2^55251552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55251552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73064376).

55251552 is an abundant number, since it is smaller than the sum of its proper divisors (90877200).

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

55251552 is a wasteful number, since it uses less digits than its factorization.

55251552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4351 (or 4343 counting only the distinct ones).

The product of its digits is 12500, while the sum is 30.

The square root of 55251552 is about 7433.1387717437. The cubic root of 55251552 is about 380.8741464027.

The spelling of 55251552 in words is "fifty-five million, two hundred fifty-one thousand, five hundred fifty-two".