162155881 has 4 divisors (see below), whose sum is σ = 165926992. Its totient is φ = 158384772.

The previous prime is 162155857. The next prime is 162155891. The reversal of 162155881 is 188551261.

162155881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 162155881 - 2¹⁷ = 162024809 is a prime.

It is a super-2 number, since 2×162155881² = 52589059485772322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 162155881.

It is not an unprimeable number, because it can be changed into a prime (162155891) 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, 1885491 + ... + 1885576.

It is an arithmetic number, because the mean of its divisors is an integer number (41481748).

Almost surely, 2^162155881 is an apocalyptic number.

It is an amenable number.

162155881 is a deficient number, since it is larger than the sum of its proper divisors (3771111).

162155881 is an equidigital number, since it uses as much as digits as its factorization.

162155881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3771110.

The product of its digits is 19200, while the sum is 37.

The square root of 162155881 is about 12734.0441730033. The cubic root of 162155881 is about 545.3109703014.

The spelling of 162155881 in words is "one hundred sixty-two million, one hundred fifty-five thousand, eight hundred eighty-one".