55225399 has 2 divisors, whose sum is σ = 55225400. Its totient is φ = 55225398.

The previous prime is 55225393. The next prime is 55225403. The reversal of 55225399 is 99352255.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55225399 - 2¹⁷ = 55094327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55225393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27612699 + 27612700.

It is an arithmetic number, because the mean of its divisors is an integer number (27612700).

Almost surely, 2^55225399 is an apocalyptic number.

55225399 is a deficient number, since it is larger than the sum of its proper divisors (1).

55225399 is an equidigital number, since it uses as much as digits as its factorization.

55225399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 121500, while the sum is 40.

The square root of 55225399 is about 7431.3793470661. The cubic root of 55225399 is about 380.8140420661.

The spelling of 55225399 in words is "fifty-five million, two hundred twenty-five thousand, three hundred ninety-nine".