55720713 has 16 divisors (see below), whose sum is σ = 79176960. Its totient is φ = 34734336.

The previous prime is 55720703. The next prime is 55720723. The reversal of 55720713 is 31702755.

It is an interprime number because it is at equal distance from previous prime (55720703) and next prime (55720723).

It is not a de Polignac number, because 55720713 - 2¹⁶ = 55655177 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55720703) 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, 4528 + ... + 11486.

It is an arithmetic number, because the mean of its divisors is an integer number (4948560).

Almost surely, 2^55720713 is an apocalyptic number.

It is an amenable number.

55720713 is a deficient number, since it is larger than the sum of its proper divisors (23456247).

55720713 is a wasteful number, since it uses less digits than its factorization.

55720713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7136.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 55720713 is about 7464.6308013190. The cubic root of 55720713 is about 381.9491562677.

The spelling of 55720713 in words is "fifty-five million, seven hundred twenty thousand, seven hundred thirteen".