55212959 has 2 divisors, whose sum is σ = 55212960. Its totient is φ = 55212958.

The previous prime is 55212947. The next prime is 55212961. The reversal of 55212959 is 95921255.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55212959 - 2²⁴ = 38435743 is a prime.

It is a Sophie Germain prime.

Together with 55212961, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55212929) 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, 27606479 + 27606480.

It is an arithmetic number, because the mean of its divisors is an integer number (27606480).

Almost surely, 2^55212959 is an apocalyptic number.

55212959 is a deficient number, since it is larger than the sum of its proper divisors (1).

55212959 is an equidigital number, since it uses as much as digits as its factorization.

55212959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40500, while the sum is 38.

The square root of 55212959 is about 7430.5423086071. The cubic root of 55212959 is about 380.7854460305.

The spelling of 55212959 in words is "fifty-five million, two hundred twelve thousand, nine hundred fifty-nine".