255642719 has 4 divisors (see below), whose sum is σ = 270680544. Its totient is φ = 240604896.

The previous prime is 255642703. The next prime is 255642773. The reversal of 255642719 is 917246552.

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

It is a cyclic number.

It is not a de Polignac number, because 255642719 - 2⁴ = 255642703 is a prime.

It is a super-2 number, since 2×255642719² = 130706399555425922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255642019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7518887 + ... + 7518920.

It is an arithmetic number, because the mean of its divisors is an integer number (67670136).

Almost surely, 2^255642719 is an apocalyptic number.

255642719 is a deficient number, since it is larger than the sum of its proper divisors (15037825).

255642719 is a wasteful number, since it uses less digits than its factorization.

255642719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15037824.

The product of its digits is 151200, while the sum is 41.

The square root of 255642719 is about 15988.8310704692. The cubic root of 255642719 is about 634.6648935566.

The spelling of 255642719 in words is "two hundred fifty-five million, six hundred forty-two thousand, seven hundred nineteen".