161515217022 has 16 divisors (see below), whose sum is σ = 327119427840. Its totient is φ = 53156906712.

The previous prime is 161515217011. The next prime is 161515217137. The reversal of 161515217022 is 220712515161.

161515217022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170374228 + ... + 170375175.

It is an arithmetic number, because the mean of its divisors is an integer number (20444964240).

Almost surely, 2^161515217022 is an apocalyptic number.

161515217022 is an abundant number, since it is smaller than the sum of its proper divisors (165604210818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161515217022 is a wasteful number, since it uses less digits than its factorization.

161515217022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340749487.

The product of its (nonzero) digits is 8400, while the sum is 33.

The spelling of 161515217022 in words is "one hundred sixty-one billion, five hundred fifteen million, two hundred seventeen thousand, twenty-two".