255540451 has 4 divisors (see below), whose sum is σ = 255737872. Its totient is φ = 255343032.

The previous prime is 255540427. The next prime is 255540491. The reversal of 255540451 is 154045552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255540451 - 2⁹ = 255539939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255540421) 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, 96756 + ... + 99361.

It is an arithmetic number, because the mean of its divisors is an integer number (63934468).

Almost surely, 2^255540451 is an apocalyptic number.

255540451 is a deficient number, since it is larger than the sum of its proper divisors (197421).

255540451 is a wasteful number, since it uses less digits than its factorization.

255540451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197420.

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 255540451 is about 15985.6326430955. The cubic root of 255540451 is about 634.5802512525.

The spelling of 255540451 in words is "two hundred fifty-five million, five hundred forty thousand, four hundred fifty-one".