257215080 has 32 divisors (see below), whose sum is σ = 771645600. Its totient is φ = 68590656.

The previous prime is 257215069. The next prime is 257215081. The reversal of 257215080 is 80512752.

257215080 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (257215081) 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, 1071610 + ... + 1071849.

It is an arithmetic number, because the mean of its divisors is an integer number (24113925).

Almost surely, 2^257215080 is an apocalyptic number.

257215080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257215080 is an abundant number, since it is smaller than the sum of its proper divisors (514430520).

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

257215080 is a wasteful number, since it uses less digits than its factorization.

257215080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2143473 (or 2143469 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 257215080 is about 16037.9262998681. The cubic root of 257215080 is about 635.9634289323.

The spelling of 257215080 in words is "two hundred fifty-seven million, two hundred fifteen thousand, eighty".