255816407 has 24 divisors (see below), whose sum is σ = 327203712. Its totient is φ = 197761200.

The previous prime is 255816397. The next prime is 255816413. The reversal of 255816407 is 704618552.

It is not a de Polignac number, because 255816407 - 2⁸ = 255816151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255816467) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68798 + ... + 72420.

It is an arithmetic number, because the mean of its divisors is an integer number (13633488).

Almost surely, 2^255816407 is an apocalyptic number.

255816407 is a deficient number, since it is larger than the sum of its proper divisors (71387305).

255816407 is a wasteful number, since it uses less digits than its factorization.

255816407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3779 (or 3772 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 255816407 is about 15994.2616897436. The cubic root of 255816407 is about 634.8085950488.

The spelling of 255816407 in words is "two hundred fifty-five million, eight hundred sixteen thousand, four hundred seven".