257541473 has 4 divisors (see below), whose sum is σ = 294333120. Its totient is φ = 220749828.

The previous prime is 257541437. The next prime is 257541481. The reversal of 257541473 is 374145752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 257541473 - 2⁸ = 257541217 is a prime.

It is a super-2 number, since 2×257541473² = 132655220630019458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257541673) 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, 18395813 + ... + 18395826.

It is an arithmetic number, because the mean of its divisors is an integer number (73583280).

Almost surely, 2^257541473 is an apocalyptic number.

It is an amenable number.

257541473 is a deficient number, since it is larger than the sum of its proper divisors (36791647).

257541473 is an equidigital number, since it uses as much as digits as its factorization.

257541473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36791646.

The product of its digits is 117600, while the sum is 38.

The square root of 257541473 is about 16048.0987347411. The cubic root of 257541473 is about 636.2323170978.

The spelling of 257541473 in words is "two hundred fifty-seven million, five hundred forty-one thousand, four hundred seventy-three".