162181331 has 8 divisors (see below), whose sum is σ = 174894720. Its totient is φ = 149501952.

The previous prime is 162181319. The next prime is 162181351. The reversal of 162181331 is 133181261.

162181331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 162181331 - 2¹⁰ = 162180307 is a prime.

It is a super-2 number, since 2×162181331² = 52605568249863122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 162181331.

It is not an unprimeable number, because it can be changed into a prime (162181351) 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, 1886 + ... + 18108.

It is an arithmetic number, because the mean of its divisors is an integer number (21861840).

Almost surely, 2^162181331 is an apocalyptic number.

162181331 is a deficient number, since it is larger than the sum of its proper divisors (12713389).

162181331 is a wasteful number, since it uses less digits than its factorization.

162181331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17005.

The product of its digits is 864, while the sum is 26.

The square root of 162181331 is about 12735.0434235616. The cubic root of 162181331 is about 545.3394972515.

The spelling of 162181331 in words is "one hundred sixty-two million, one hundred eighty-one thousand, three hundred thirty-one".