55237613 has 2 divisors, whose sum is σ = 55237614. Its totient is φ = 55237612.

The previous prime is 55237577. The next prime is 55237639. The reversal of 55237613 is 31673255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55160329 + 77284 = 7427^2 + 278^2 .

It is a cyclic number.

It is not a de Polignac number, because 55237613 - 2¹² = 55233517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55237613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55237673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27618806 + 27618807.

It is an arithmetic number, because the mean of its divisors is an integer number (27618807).

Almost surely, 2^55237613 is an apocalyptic number.

It is an amenable number.

55237613 is a deficient number, since it is larger than the sum of its proper divisors (1).

55237613 is an equidigital number, since it uses as much as digits as its factorization.

55237613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900, while the sum is 32.

The square root of 55237613 is about 7432.2010871612. The cubic root of 55237613 is about 380.8421144141.

The spelling of 55237613 in words is "fifty-five million, two hundred thirty-seven thousand, six hundred thirteen".