255721542 has 16 divisors (see below), whose sum is σ = 527941632. Its totient is φ = 82490760.

The previous prime is 255721493. The next prime is 255721549. The reversal of 255721542 is 245127552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255721549) 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, 687238 + ... + 687609.

It is an arithmetic number, because the mean of its divisors is an integer number (32996352).

Almost surely, 2^255721542 is an apocalyptic number.

255721542 is an abundant number, since it is smaller than the sum of its proper divisors (272220090).

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

255721542 is a wasteful number, since it uses less digits than its factorization.

255721542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374883.

The product of its digits is 28000, while the sum is 33.

The square root of 255721542 is about 15991.2958199140. The cubic root of 255721542 is about 634.7301161590.

The spelling of 255721542 in words is "two hundred fifty-five million, seven hundred twenty-one thousand, five hundred forty-two".