255613540 has 144 divisors (see below), whose sum is σ = 688326912. Its totient is φ = 77640192.

The previous prime is 255613537. The next prime is 255613549. The reversal of 255613540 is 45316552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255613549) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1530537 + ... + 1530703.

It is an arithmetic number, because the mean of its divisors is an integer number (4780048).

Almost surely, 2^255613540 is an apocalyptic number.

255613540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255613540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344163456).

255613540 is an abundant number, since it is smaller than the sum of its proper divisors (432713372).

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

255613540 is a wasteful number, since it uses less digits than its factorization.

255613540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 255613540 is about 15987.9185637155. The cubic root of 255613540 is about 634.6407458038.

The spelling of 255613540 in words is "two hundred fifty-five million, six hundred thirteen thousand, five hundred forty".