55830013 has 2 divisors, whose sum is σ = 55830014. Its totient is φ = 55830012.

The previous prime is 55830001. The next prime is 55830053. The reversal of 55830013 is 31003855.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38962564 + 16867449 = 6242^2 + 4107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55830013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55830013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55830053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27915006 + 27915007.

It is an arithmetic number, because the mean of its divisors is an integer number (27915007).

Almost surely, 2^55830013 is an apocalyptic number.

It is an amenable number.

55830013 is a deficient number, since it is larger than the sum of its proper divisors (1).

55830013 is an equidigital number, since it uses as much as digits as its factorization.

55830013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 55830013 is about 7471.9484072095. The cubic root of 55830013 is about 382.1987329731.

Adding to 55830013 its reverse (31003855), we get a palindrome (86833868).

The spelling of 55830013 in words is "fifty-five million, eight hundred thirty thousand, thirteen".