255977145 has 64 divisors (see below), whose sum is σ = 471744000. Its totient is φ = 131604480.

The previous prime is 255977131. The next prime is 255977159. The reversal of 255977145 is 541779552.

It is an interprime number because it is at equal distance from previous prime (255977131) and next prime (255977159).

It is not a de Polignac number, because 255977145 - 2⁴ = 255977129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 255977145.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 569881 + ... + 570329.

It is an arithmetic number, because the mean of its divisors is an integer number (7371000).

Almost surely, 2^255977145 is an apocalyptic number.

It is an amenable number.

255977145 is a deficient number, since it is larger than the sum of its proper divisors (215766855).

255977145 is a wasteful number, since it uses less digits than its factorization.

255977145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607 (or 601 counting only the distinct ones).

The product of its digits is 441000, while the sum is 45.

The square root of 255977145 is about 15999.2857653084. The cubic root of 255977145 is about 634.9415243650.

The spelling of 255977145 in words is "two hundred fifty-five million, nine hundred seventy-seven thousand, one hundred forty-five".