55133957 has 2 divisors, whose sum is σ = 55133958. Its totient is φ = 55133956.

The previous prime is 55133929. The next prime is 55133963. The reversal of 55133957 is 75933155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32103556 + 23030401 = 5666^2 + 4799^2 .

It is a cyclic number.

It is not a de Polignac number, because 55133957 - 2⁶ = 55133893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55133957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55133977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27566978 + 27566979.

It is an arithmetic number, because the mean of its divisors is an integer number (27566979).

Almost surely, 2^55133957 is an apocalyptic number.

It is an amenable number.

55133957 is a deficient number, since it is larger than the sum of its proper divisors (1).

55133957 is an equidigital number, since it uses as much as digits as its factorization.

55133957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70875, while the sum is 38.

The square root of 55133957 is about 7425.2243737142. The cubic root of 55133957 is about 380.6037424844.

The spelling of 55133957 in words is "fifty-five million, one hundred thirty-three thousand, nine hundred fifty-seven".