257222260 has 12 divisors (see below), whose sum is σ = 540166788. Its totient is φ = 102888896.

The previous prime is 257222227. The next prime is 257222263. The reversal of 257222260 is 62222752.

It is a happy number.

257222260 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 75134224 + 182088036 = 8668^2 + 13494^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257222263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6430537 + ... + 6430576.

It is an arithmetic number, because the mean of its divisors is an integer number (45013899).

Almost surely, 2^257222260 is an apocalyptic number.

257222260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257222260 is an abundant number, since it is smaller than the sum of its proper divisors (282944528).

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

257222260 is a wasteful number, since it uses less digits than its factorization.

257222260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12861122 (or 12861120 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 257222260 is about 16038.1501427066. The cubic root of 257222260 is about 635.9693463859.

The spelling of 257222260 in words is "two hundred fifty-seven million, two hundred twenty-two thousand, two hundred sixty".