55712513 has 2 divisors, whose sum is σ = 55712514. Its totient is φ = 55712512.

The previous prime is 55712483. The next prime is 55712539. The reversal of 55712513 is 31521755.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54582544 + 1129969 = 7388^2 + 1063^2 .

It is a cyclic number.

It is not a de Polignac number, because 55712513 - 2¹⁰ = 55711489 is a prime.

It is a super-3 number, since 3×55712513³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (55712543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27856256 + 27856257.

It is an arithmetic number, because the mean of its divisors is an integer number (27856257).

Almost surely, 2^55712513 is an apocalyptic number.

It is an amenable number.

55712513 is a deficient number, since it is larger than the sum of its proper divisors (1).

55712513 is an equidigital number, since it uses as much as digits as its factorization.

55712513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5250, while the sum is 29.

The square root of 55712513 is about 7464.0815242064. The cubic root of 55712513 is about 381.9304191497.

The spelling of 55712513 in words is "fifty-five million, seven hundred twelve thousand, five hundred thirteen".