161156207 has 2 divisors, whose sum is σ = 161156208. Its totient is φ = 161156206.

The previous prime is 161156189. The next prime is 161156213. The reversal of 161156207 is 702651161.

It is a strong prime.

It is an emirp because it is prime and its reverse (702651161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161156207 - 2¹² = 161152111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161156207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161156227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80578103 + 80578104.

It is an arithmetic number, because the mean of its divisors is an integer number (80578104).

Almost surely, 2^161156207 is an apocalyptic number.

161156207 is a deficient number, since it is larger than the sum of its proper divisors (1).

161156207 is an equidigital number, since it uses as much as digits as its factorization.

161156207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 161156207 is about 12694.7314662422. The cubic root of 161156207 is about 544.1880646179.

It can be divided in two parts, 16115 and 6207, that added together give a palindrome (22322).

The spelling of 161156207 in words is "one hundred sixty-one million, one hundred fifty-six thousand, two hundred seven".