160225781 has 4 divisors (see below), whose sum is σ = 160591200. Its totient is φ = 159860364.

The previous prime is 160225691. The next prime is 160225787. The reversal of 160225781 is 187522061.

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: 187522061 = 12889 ⋅14549.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-160225781 is a prime.

It is a super-2 number, since 2×160225781² = 51344601794119922, 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 (160225787) 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, 182051 + ... + 182928.

It is an arithmetic number, because the mean of its divisors is an integer number (40147800).

Almost surely, 2^160225781 is an apocalyptic number.

It is an amenable number.

160225781 is a deficient number, since it is larger than the sum of its proper divisors (365419).

160225781 is an equidigital number, since it uses as much as digits as its factorization.

160225781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365418.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 160225781 is about 12658.0322720398. The cubic root of 160225781 is about 543.1387632659.

The spelling of 160225781 in words is "one hundred sixty million, two hundred twenty-five thousand, seven hundred eighty-one".