55215263 has 2 divisors, whose sum is σ = 55215264. Its totient is φ = 55215262.

The previous prime is 55215239. The next prime is 55215299. The reversal of 55215263 is 36251255.

It is a happy number.

55215263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55215263 - 2¹⁰ = 55214239 is a prime.

It is equal to p_3294308 and since 55215263 and 3294308 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55211263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27607631 + 27607632.

It is an arithmetic number, because the mean of its divisors is an integer number (27607632).

Almost surely, 2^55215263 is an apocalyptic number.

55215263 is a deficient number, since it is larger than the sum of its proper divisors (1).

55215263 is an equidigital number, since it uses as much as digits as its factorization.

55215263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 29.

The square root of 55215263 is about 7430.6973427802. The cubic root of 55215263 is about 380.7907425978.

The spelling of 55215263 in words is "fifty-five million, two hundred fifteen thousand, two hundred sixty-three".