255401540 has 24 divisors (see below), whose sum is σ = 567893592. Its totient is φ = 96151040.

The previous prime is 255401537. The next prime is 255401543. The reversal of 255401540 is 45104552.

255401540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (255401537) and next prime (255401543).

It can be written as a sum of positive squares in 4 ways, for example, as 136983616 + 118417924 = 11704^2 + 10882^2 .

It is not an unprimeable number, because it can be changed into a prime (255401543) 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, 375251 + ... + 375930.

It is an arithmetic number, because the mean of its divisors is an integer number (23662233).

Almost surely, 2^255401540 is an apocalyptic number.

255401540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255401540 is an abundant number, since it is smaller than the sum of its proper divisors (312492052).

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

255401540 is a wasteful number, since it uses less digits than its factorization.

255401540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751207 (or 751205 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 255401540 is about 15981.2871822016. The cubic root of 255401540 is about 634.4652451227.

The spelling of 255401540 in words is "two hundred fifty-five million, four hundred one thousand, five hundred forty".