257422369 has 8 divisors (see below), whose sum is σ = 265104000. Its totient is φ = 249851472.

The previous prime is 257422367. The next prime is 257422391. The reversal of 257422369 is 963224752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257422369 - 2¹ = 257422367 is a prime.

It is a super-2 number, since 2×257422369² = 132532552123144322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257422367) 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, 22954 + ... + 32275.

It is an arithmetic number, because the mean of its divisors is an integer number (33138000).

Almost surely, 2^257422369 is an apocalyptic number.

It is an amenable number.

257422369 is a deficient number, since it is larger than the sum of its proper divisors (7681631).

257422369 is an equidigital number, since it uses as much as digits as its factorization.

257422369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55367.

The product of its digits is 181440, while the sum is 40.

The square root of 257422369 is about 16044.3874610407. The cubic root of 257422369 is about 636.1342235137.

The spelling of 257422369 in words is "two hundred fifty-seven million, four hundred twenty-two thousand, three hundred sixty-nine".