1255515000 has 80 divisors (see below), whose sum is σ = 3922275720. Its totient is φ = 334800000.

The previous prime is 1255514999. The next prime is 1255515011. The reversal of 1255515000 is 5155521.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26851 + ... + 56850.

Almost surely, 2^1255515000 is an apocalyptic number.

1255515000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255515000 is an abundant number, since it is smaller than the sum of its proper divisors (2666760720).

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

1255515000 is an equidigital number, since it uses as much as digits as its factorization.

1255515000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83730 (or 83711 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 24.

The square root of 1255515000 is about 35433.2470992993. The cubic root of 1255515000 is about 1078.7992484813.

The spelling of 1255515000 in words is "one billion, two hundred fifty-five million, five hundred fifteen thousand".