255645015 has 16 divisors (see below), whose sum is σ = 409826688. Its totient is φ = 136079136.

The previous prime is 255645001. The next prime is 255645029. The reversal of 255645015 is 510546552.

It is an interprime number because it is at equal distance from previous prime (255645001) and next prime (255645029).

It is not a de Polignac number, because 255645015 - 2²⁰ = 254596439 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8449 + ... + 24138.

It is an arithmetic number, because the mean of its divisors is an integer number (25614168).

Almost surely, 2^255645015 is an apocalyptic number.

255645015 is a deficient number, since it is larger than the sum of its proper divisors (154181673).

255645015 is a wasteful number, since it uses less digits than its factorization.

255645015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33118.

The product of its (nonzero) digits is 30000, while the sum is 33.

The square root of 255645015 is about 15988.9028704286. The cubic root of 255645015 is about 634.6667935863. Note that the first 3 decimals are identical.

The spelling of 255645015 in words is "two hundred fifty-five million, six hundred forty-five thousand, fifteen".