255135540 has 48 divisors (see below), whose sum is σ = 779325120. Its totient is φ = 61850880.

The previous prime is 255135539. The next prime is 255135547. The reversal of 255135540 is 45531552.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 255135498 and 255135507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255135547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192625 + ... + 193944.

It is an arithmetic number, because the mean of its divisors is an integer number (16235940).

Almost surely, 2^255135540 is an apocalyptic number.

255135540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255135540 is an abundant number, since it is smaller than the sum of its proper divisors (524189580).

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

255135540 is a wasteful number, since it uses less digits than its factorization.

255135540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386592 (or 386590 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 255135540 is about 15972.9627808995. The cubic root of 255135540 is about 634.2449040087.

The spelling of 255135540 in words is "two hundred fifty-five million, one hundred thirty-five thousand, five hundred forty".