257224433 has 8 divisors (see below), whose sum is σ = 284197248. Its totient is φ = 231567424.

The previous prime is 257224421. The next prime is 257224439. The reversal of 257224433 is 334422752.

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 257224433 - 2¹⁰ = 257223409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 257224433.

It is not an unprimeable number, because it can be changed into a prime (257224439) 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, 328541 + ... + 329322.

It is an arithmetic number, because the mean of its divisors is an integer number (35524656).

Almost surely, 2^257224433 is an apocalyptic number.

257224433 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

257224433 is a deficient number, since it is larger than the sum of its proper divisors (26972815).

257224433 is a wasteful number, since it uses less digits than its factorization.

257224433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657903.

The product of its digits is 40320, while the sum is 32.

The square root of 257224433 is about 16038.2178872841. The cubic root of 257224433 is about 635.9711372593.

The spelling of 257224433 in words is "two hundred fifty-seven million, two hundred twenty-four thousand, four hundred thirty-three".