255916942 has 4 divisors (see below), whose sum is σ = 383875416. Its totient is φ = 127958470.

The previous prime is 255916937. The next prime is 255916981. The reversal of 255916942 is 249619552.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63979234 + ... + 63979237.

It is an arithmetic number, because the mean of its divisors is an integer number (95968854).

Almost surely, 2^255916942 is an apocalyptic number.

255916942 is a deficient number, since it is larger than the sum of its proper divisors (127958474).

255916942 is a wasteful number, since it uses less digits than its factorization.

255916942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127958473.

The product of its digits is 194400, while the sum is 43.

The square root of 255916942 is about 15997.4042269363. The cubic root of 255916942 is about 634.8917433820.

The spelling of 255916942 in words is "two hundred fifty-five million, nine hundred sixteen thousand, nine hundred forty-two".