255252990 has 16 divisors (see below), whose sum is σ = 612607248. Its totient is φ = 68067456.

The previous prime is 255252989. The next prime is 255253013. The reversal of 255252990 is 99252552.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4254187 + ... + 4254246.

It is an arithmetic number, because the mean of its divisors is an integer number (38287953).

Almost surely, 2^255252990 is an apocalyptic number.

255252990 is an abundant number, since it is smaller than the sum of its proper divisors (357354258).

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

255252990 is a wasteful number, since it uses less digits than its factorization.

255252990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8508443.

The product of its (nonzero) digits is 81000, while the sum is 39.

The square root of 255252990 is about 15976.6388830692. The cubic root of 255252990 is about 634.3422125952.

The spelling of 255252990 in words is "two hundred fifty-five million, two hundred fifty-two thousand, nine hundred ninety".