55715730 has 32 divisors (see below), whose sum is σ = 152820864. Its totient is φ = 12734976.

The previous prime is 55715707. The next prime is 55715731. The reversal of 55715730 is 3751755.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55715691 and 55715700.

It is not an unprimeable number, because it can be changed into a prime (55715731) 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, 132447 + ... + 132866.

It is an arithmetic number, because the mean of its divisors is an integer number (4775652).

Almost surely, 2^55715730 is an apocalyptic number.

55715730 is an abundant number, since it is smaller than the sum of its proper divisors (97105134).

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

55715730 is a wasteful number, since it uses less digits than its factorization.

55715730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265330.

The product of its (nonzero) digits is 18375, while the sum is 33.

The square root of 55715730 is about 7464.2970198137. The cubic root of 55715730 is about 381.9377702601.

The spelling of 55715730 in words is "fifty-five million, seven hundred fifteen thousand, seven hundred thirty".