55751520 has 96 divisors (see below), whose sum is σ = 191600640. Its totient is φ = 13514240.

The previous prime is 55751497. The next prime is 55751533. The reversal of 55751520 is 2515755.

55751520 is a nontrivial binomial coefficient, being equal to C(10560, 2).

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1 + ... + 10559.

It is an arithmetic number, because the mean of its divisors is an integer number (1995840).

Almost surely, 2^55751520 is an apocalyptic number.

55751520 is the 10559-th triangular number and also the 5280-th hexagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55751520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95800320).

55751520 is an abundant number, since it is smaller than the sum of its proper divisors (135849120).

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

55751520 is a wasteful number, since it uses less digits than its factorization.

55751520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10588 (or 10580 counting only the distinct ones).

The product of its (nonzero) digits is 8750, while the sum is 30.

The square root of 55751520 is about 7466.6940475688. The cubic root of 55751520 is about 382.0195342843.

The spelling of 55751520 in words is "fifty-five million, seven hundred fifty-one thousand, five hundred twenty".