255403251 has 6 divisors (see below), whose sum is σ = 368915820. Its totient is φ = 170268828.

The previous prime is 255403249. The next prime is 255403277. The reversal of 255403251 is 152304552.

It is a happy number.

255403251 is a `hidden beast` number, since 2 + 5 + 5 + 403 + 251 = 666.

It is not a de Polignac number, because 255403251 - 2¹ = 255403249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255403151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14189061 + ... + 14189078.

It is an arithmetic number, because the mean of its divisors is an integer number (61485970).

Almost surely, 2^255403251 is an apocalyptic number.

255403251 is a deficient number, since it is larger than the sum of its proper divisors (113512569).

255403251 is a wasteful number, since it uses less digits than its factorization.

255403251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28378145 (or 28378142 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 255403251 is about 15981.3407134696. The cubic root of 255403251 is about 634.4666619343.

The spelling of 255403251 in words is "two hundred fifty-five million, four hundred three thousand, two hundred fifty-one".