255516040 has 32 divisors (see below), whose sum is σ = 619136280. Its totient is φ = 94344192.

The previous prime is 255516031. The next prime is 255516049. The reversal of 255516040 is 40615552.

It is an interprime number because it is at equal distance from previous prime (255516031) and next prime (255516049).

It can be written as a sum of positive squares in 4 ways, for example, as 118766404 + 136749636 = 10898^2 + 11694^2 .

It is not an unprimeable number, because it can be changed into a prime (255516049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245169 + ... + 246208.

Almost surely, 2^255516040 is an apocalyptic number.

255516040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255516040 is an abundant number, since it is smaller than the sum of its proper divisors (363620240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255516040 is a wasteful number, since it uses less digits than its factorization.

255516040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491401 (or 491397 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 255516040 is about 15984.8690954915. The cubic root of 255516040 is about 634.5600441037.

The spelling of 255516040 in words is "two hundred fifty-five million, five hundred sixteen thousand, forty".