160331257 has 4 divisors (see below), whose sum is σ = 160397136. Its totient is φ = 160265380.

The previous prime is 160331239. The next prime is 160331299. The reversal of 160331257 is 752133061.

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, and also an emirpimes, since its reverse is a distinct semiprime: 752133061 = 20051 ⋅37511.

It is a cyclic number.

It is not a de Polignac number, because 160331257 - 2²³ = 151942649 is a prime.

It is a super-2 number, since 2×160331257² = 51412223942400098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (160331957) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 29143 + ... + 34204.

It is an arithmetic number, because the mean of its divisors is an integer number (40099284).

Almost surely, 2^160331257 is an apocalyptic number.

It is an amenable number.

160331257 is a deficient number, since it is larger than the sum of its proper divisors (65879).

160331257 is an equidigital number, since it uses as much as digits as its factorization.

160331257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65878.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 160331257 is about 12662.1979529622. The cubic root of 160331257 is about 543.2579191587.

The spelling of 160331257 in words is "one hundred sixty million, three hundred thirty-one thousand, two hundred fifty-seven".