55597013 has 4 divisors (see below), whose sum is σ = 55827948. Its totient is φ = 55366080.

The previous prime is 55597007. The next prime is 55597033. The reversal of 55597013 is 31079555.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48748324 + 6848689 = 6982^2 + 2617^2 .

It is a cyclic number.

It is not a de Polignac number, because 55597013 - 2⁸ = 55596757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55597033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115106 + ... + 115587.

It is an arithmetic number, because the mean of its divisors is an integer number (13956987).

Almost surely, 2^55597013 is an apocalyptic number.

It is an amenable number.

55597013 is a deficient number, since it is larger than the sum of its proper divisors (230935).

55597013 is a wasteful number, since it uses less digits than its factorization.

55597013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230934.

The product of its (nonzero) digits is 23625, while the sum is 35.

The square root of 55597013 is about 7456.3404562828. The cubic root of 55597013 is about 381.6663044391. Note that the first 3 decimals are identical.

The spelling of 55597013 in words is "fifty-five million, five hundred ninety-seven thousand, thirteen".