255635997 has 32 divisors (see below), whose sum is σ = 358963200. Its totient is φ = 161663040.

The previous prime is 255635983. The next prime is 255636001. The reversal of 255635997 is 799536552.

255635997 is nontrivially palindromic in base 11.

It is not a de Polignac number, because 255635997 - 2⁴ = 255635981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255635917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1284504 + ... + 1284702.

It is an arithmetic number, because the mean of its divisors is an integer number (11217600).

Almost surely, 2^255635997 is an apocalyptic number.

It is an amenable number.

255635997 is a deficient number, since it is larger than the sum of its proper divisors (103327203).

255635997 is a wasteful number, since it uses less digits than its factorization.

255635997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473.

The product of its digits is 2551500, while the sum is 51.

The square root of 255635997 is about 15988.6208598490. The cubic root of 255635997 is about 634.6593307738.

The spelling of 255635997 in words is "two hundred fifty-five million, six hundred thirty-five thousand, nine hundred ninety-seven".