55087472 has 80 divisors (see below), whose sum is σ = 123742080. Its totient is φ = 23520000.

The previous prime is 55087471. The next prime is 55087519. The reversal of 55087472 is 27478055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55087471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219347 + ... + 219597.

It is an arithmetic number, because the mean of its divisors is an integer number (1546776).

Almost surely, 2^55087472 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 55087472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61871040).

55087472 is an abundant number, since it is smaller than the sum of its proper divisors (68654608).

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

55087472 is a wasteful number, since it uses less digits than its factorization.

55087472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 55087472 is about 7422.0935052046. The cubic root of 55087472 is about 380.4967464782.

The spelling of 55087472 in words is "fifty-five million, eighty-seven thousand, four hundred seventy-two".