55790513 has 2 divisors, whose sum is σ = 55790514. Its totient is φ = 55790512.

The previous prime is 55790509. The next prime is 55790531. The reversal of 55790513 is 31509755.

Together with next prime (55790531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54272689 + 1517824 = 7367^2 + 1232^2 .

It is a cyclic number.

It is not a de Polignac number, because 55790513 - 2² = 55790509 is a prime.

It is a super-2 number, since 2×55790513² = 6225162681606338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55790533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27895256 + 27895257.

It is an arithmetic number, because the mean of its divisors is an integer number (27895257).

Almost surely, 2^55790513 is an apocalyptic number.

It is an amenable number.

55790513 is a deficient number, since it is larger than the sum of its proper divisors (1).

55790513 is an equidigital number, since it uses as much as digits as its factorization.

55790513 is an evil number, because the sum of its binary digits is even.

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

The square root of 55790513 is about 7469.3047199857. The cubic root of 55790513 is about 382.1085758999.

The spelling of 55790513 in words is "fifty-five million, seven hundred ninety thousand, five hundred thirteen".