257122212 has 48 divisors (see below), whose sum is σ = 668687040. Its totient is φ = 76419072.

The previous prime is 257122199. The next prime is 257122247. The reversal of 257122212 is 212221752.

It is a super-2 number, since 2×257122212² = 132223663807545888, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 29293 + ... + 37044.

It is an arithmetic number, because the mean of its divisors is an integer number (13930980).

Almost surely, 2^257122212 is an apocalyptic number.

It is an amenable number.

257122212 is an abundant number, since it is smaller than the sum of its proper divisors (411564828).

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

257122212 is a wasteful number, since it uses less digits than its factorization.

257122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66380 (or 66378 counting only the distinct ones).

The product of its digits is 1120, while the sum is 24.

The square root of 257122212 is about 16035.0307763970. The cubic root of 257122212 is about 635.8868811121.

Adding to 257122212 its reverse (212221752), we get a palindrome (469343964).

The spelling of 257122212 in words is "two hundred fifty-seven million, one hundred twenty-two thousand, two hundred twelve".