255622397 has 4 divisors (see below), whose sum is σ = 259955040. Its totient is φ = 251289756.

The previous prime is 255622379. The next prime is 255622417. The reversal of 255622397 is 793226552.

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 255622397 - 2⁸ = 255622141 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 (255622357) 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, 2166233 + ... + 2166350.

It is an arithmetic number, because the mean of its divisors is an integer number (64988760).

Almost surely, 2^255622397 is an apocalyptic number.

It is an amenable number.

255622397 is a deficient number, since it is larger than the sum of its proper divisors (4332643).

255622397 is an equidigital number, since it uses as much as digits as its factorization.

255622397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4332642.

The product of its digits is 226800, while the sum is 41.

The square root of 255622397 is about 15988.1955517188. The cubic root of 255622397 is about 634.6480758122.

The spelling of 255622397 in words is "two hundred fifty-five million, six hundred twenty-two thousand, three hundred ninety-seven".