162185381 has 8 divisors (see below), whose sum is σ = 166584600. Its totient is φ = 157807360.

The previous prime is 162185377. The next prime is 162185383. The reversal of 162185381 is 183581261.

It can be written as a sum of positive squares in 4 ways, for example, as 8797156 + 153388225 = 2966^2 + 12385^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 162185381 - 2² = 162185377 is a prime.

It is a super-2 number, since 2×162185381² = 52608195620230322, 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 (162185383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10865 + ... + 21033.

It is an arithmetic number, because the mean of its divisors is an integer number (20823075).

Almost surely, 2^162185381 is an apocalyptic number.

It is an amenable number.

162185381 is a deficient number, since it is larger than the sum of its proper divisors (4399219).

162185381 is a wasteful number, since it uses less digits than its factorization.

162185381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10599.

The product of its digits is 11520, while the sum is 35.

The square root of 162185381 is about 12735.2024326274. The cubic root of 162185381 is about 545.3440366285.

The spelling of 162185381 in words is "one hundred sixty-two million, one hundred eighty-five thousand, three hundred eighty-one".