255171540 has 192 divisors, whose sum is σ = 811948032. Its totient is φ = 59443200.

The previous prime is 255171533. The next prime is 255171563. The reversal of 255171540 is 45171552.

It is a super-2 number, since 2×255171540² = 130225029651943200, which contains 22 as substring.

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 = 255171498 and 255171507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1474894 + ... + 1475066.

It is an arithmetic number, because the mean of its divisors is an integer number (4228896).

Almost surely, 2^255171540 is an apocalyptic number.

255171540 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 255171540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405974016).

255171540 is an abundant number, since it is smaller than the sum of its proper divisors (556776492).

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

255171540 is a wasteful number, since it uses less digits than its factorization.

255171540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 30.

The square root of 255171540 is about 15974.0896454227. The cubic root of 255171540 is about 634.2747335688.

The spelling of 255171540 in words is "two hundred fifty-five million, one hundred seventy-one thousand, five hundred forty".