55730913 has 16 divisors (see below), whose sum is σ = 89919360. Its totient is φ = 29972736.

The previous prime is 55730911. The next prime is 55730951. The reversal of 55730913 is 31903755.

It is not a de Polignac number, because 55730913 - 2¹ = 55730911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55730911) 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, 77698 + ... + 78411.

It is an arithmetic number, because the mean of its divisors is an integer number (5619960).

Almost surely, 2^55730913 is an apocalyptic number.

It is an amenable number.

55730913 is a deficient number, since it is larger than the sum of its proper divisors (34188447).

55730913 is a wasteful number, since it uses less digits than its factorization.

55730913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156136.

The product of its (nonzero) digits is 14175, while the sum is 33.

The square root of 55730913 is about 7465.3139920569. The cubic root of 55730913 is about 381.9724608492.

The spelling of 55730913 in words is "fifty-five million, seven hundred thirty thousand, nine hundred thirteen".