55145837 has 2 divisors, whose sum is σ = 55145838. Its totient is φ = 55145836.

The previous prime is 55145821. The next prime is 55145843. The reversal of 55145837 is 73854155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55145476 + 361 = 7426^2 + 19^2 .

It is a cyclic number.

It is not a de Polignac number, because 55145837 - 2⁴ = 55145821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55145837.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55145137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27572918 + 27572919.

It is an arithmetic number, because the mean of its divisors is an integer number (27572919).

Almost surely, 2^55145837 is an apocalyptic number.

It is an amenable number.

55145837 is a deficient number, since it is larger than the sum of its proper divisors (1).

55145837 is an equidigital number, since it uses as much as digits as its factorization.

55145837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84000, while the sum is 38.

The square root of 55145837 is about 7426.0243064509. The cubic root of 55145837 is about 380.6310774094.

The spelling of 55145837 in words is "fifty-five million, one hundred forty-five thousand, eight hundred thirty-seven".