162857381 has 2 divisors, whose sum is σ = 162857382. Its totient is φ = 162857380.

The previous prime is 162857333. The next prime is 162857389. The reversal of 162857381 is 183758261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159794881 + 3062500 = 12641^2 + 1750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162857381 is a prime.

It is a super-2 number, since 2×162857381² = 53045053092358322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162857389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81428690 + 81428691.

It is an arithmetic number, because the mean of its divisors is an integer number (81428691).

Almost surely, 2^162857381 is an apocalyptic number.

It is an amenable number.

162857381 is a deficient number, since it is larger than the sum of its proper divisors (1).

162857381 is an equidigital number, since it uses as much as digits as its factorization.

162857381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 41.

The square root of 162857381 is about 12761.5587214102. The cubic root of 162857381 is about 546.0961928048.

The spelling of 162857381 in words is "one hundred sixty-two million, eight hundred fifty-seven thousand, three hundred eighty-one".