156160221 has 16 divisors (see below), whose sum is σ = 250483200. Its totient is φ = 84537648.

The previous prime is 156160217. The next prime is 156160231. The reversal of 156160221 is 122061651.

It is not a de Polignac number, because 156160221 - 2² = 156160217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 156160191 and 156160200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156160231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195291 + ... + 196088.

It is an arithmetic number, because the mean of its divisors is an integer number (15655200).

Almost surely, 2^156160221 is an apocalyptic number.

It is an amenable number.

156160221 is a deficient number, since it is larger than the sum of its proper divisors (94322979).

156160221 is a wasteful number, since it uses less digits than its factorization.

156160221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391408.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 156160221 is about 12496.4083239945. The cubic root of 156160221 is about 538.5054938147.

The spelling of 156160221 in words is "one hundred fifty-six million, one hundred sixty thousand, two hundred twenty-one".