255199421 has 4 divisors (see below), whose sum is σ = 266295072. Its totient is φ = 244103772.

The previous prime is 255199403. The next prime is 255199499. The reversal of 255199421 is 124991552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255199421 - 2¹⁴ = 255183037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255190421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5547791 + ... + 5547836.

It is an arithmetic number, because the mean of its divisors is an integer number (66573768).

Almost surely, 2^255199421 is an apocalyptic number.

It is an amenable number.

255199421 is a deficient number, since it is larger than the sum of its proper divisors (11095651).

255199421 is a wasteful number, since it uses less digits than its factorization.

255199421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11095650.

The product of its digits is 32400, while the sum is 38.

The square root of 255199421 is about 15974.9623160745. The cubic root of 255199421 is about 634.2978338066.

The spelling of 255199421 in words is "two hundred fifty-five million, one hundred ninety-nine thousand, four hundred twenty-one".