162271257 has 4 divisors (see below), whose sum is σ = 216361680. Its totient is φ = 108180836.

The previous prime is 162271237. The next prime is 162271271. The reversal of 162271257 is 752172261.

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: 752172261 = 3 ⋅250724087.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162271257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (162271237) 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, 27045207 + ... + 27045212.

It is an arithmetic number, because the mean of its divisors is an integer number (54090420).

Almost surely, 2^162271257 is an apocalyptic number.

It is an amenable number.

162271257 is a deficient number, since it is larger than the sum of its proper divisors (54090423).

162271257 is an equidigital number, since it uses as much as digits as its factorization.

162271257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54090422.

The product of its digits is 11760, while the sum is 33.

The square root of 162271257 is about 12738.5735857670. The cubic root of 162271257 is about 545.4402715684.

The spelling of 162271257 in words is "one hundred sixty-two million, two hundred seventy-one thousand, two hundred fifty-seven".