156222005 has 16 divisors (see below), whose sum is σ = 192117744. Its totient is φ = 121904640.

The previous prime is 156221999. The next prime is 156222023. The reversal of 156222005 is 500222651.

156222005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1493284 + 154728721 = 1222^2 + 12439^2 .

It is not a de Polignac number, because 156222005 - 2¹⁸ = 155959861 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46337 + ... + 49593.

It is an arithmetic number, because the mean of its divisors is an integer number (12007359).

Almost surely, 2^156222005 is an apocalyptic number.

It is an amenable number.

156222005 is a deficient number, since it is larger than the sum of its proper divisors (35895739).

156222005 is a wasteful number, since it uses less digits than its factorization.

156222005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3496.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 156222005 is about 12498.8801498374. The cubic root of 156222005 is about 538.5765034405.

Adding to 156222005 its reverse (500222651), we get a palindrome (656444656).

The spelling of 156222005 in words is "one hundred fifty-six million, two hundred twenty-two thousand, five".