55223251 has 2 divisors, whose sum is σ = 55223252. Its totient is φ = 55223250.

The previous prime is 55223249. The next prime is 55223321. The reversal of 55223251 is 15232255.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55223251 - 2¹ = 55223249 is a prime.

Together with 55223249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55233251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27611625 + 27611626.

It is an arithmetic number, because the mean of its divisors is an integer number (27611626).

Almost surely, 2^55223251 is an apocalyptic number.

55223251 is a deficient number, since it is larger than the sum of its proper divisors (1).

55223251 is an equidigital number, since it uses as much as digits as its factorization.

55223251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3000, while the sum is 25.

The square root of 55223251 is about 7431.2348233655. The cubic root of 55223251 is about 380.8091047294.

The spelling of 55223251 in words is "fifty-five million, two hundred twenty-three thousand, two hundred fifty-one".