257620343 has 8 divisors (see below), whose sum is σ = 267247680. Its totient is φ = 248152320.

The previous prime is 257620339. The next prime is 257620367. The reversal of 257620343 is 343026752.

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 257620343 - 2² = 257620339 is a prime.

It is a super-2 number, since 2×257620343² = 132736482254875298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257620303) 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, 36530 + ... + 43007.

It is an arithmetic number, because the mean of its divisors is an integer number (33405960).

Almost surely, 2^257620343 is an apocalyptic number.

257620343 is a deficient number, since it is larger than the sum of its proper divisors (9627337).

257620343 is an equidigital number, since it uses as much as digits as its factorization.

257620343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79657.

The product of its (nonzero) digits is 30240, while the sum is 32.

The square root of 257620343 is about 16050.5558470727. Note that the first 3 decimals coincide. The cubic root of 257620343 is about 636.2972574752.

The spelling of 257620343 in words is "two hundred fifty-seven million, six hundred twenty thousand, three hundred forty-three".