156215161 has 2 divisors, whose sum is σ = 156215162. Its totient is φ = 156215160.

The previous prime is 156215113. The next prime is 156215167. The reversal of 156215161 is 161512651.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152053561 + 4161600 = 12331^2 + 2040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156215161 is a prime.

It is not a weakly prime, because it can be changed into another prime (156215167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78107580 + 78107581.

It is an arithmetic number, because the mean of its divisors is an integer number (78107581).

Almost surely, 2^156215161 is an apocalyptic number.

It is an amenable number.

156215161 is a deficient number, since it is larger than the sum of its proper divisors (1).

156215161 is an equidigital number, since it uses as much as digits as its factorization.

156215161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 28.

The square root of 156215161 is about 12498.6063623110. The cubic root of 156215161 is about 538.5686384123.

The spelling of 156215161 in words is "one hundred fifty-six million, two hundred fifteen thousand, one hundred sixty-one".