161176231 has 2 divisors, whose sum is σ = 161176232. Its totient is φ = 161176230.

The previous prime is 161176219. The next prime is 161176271. The reversal of 161176231 is 132671161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161176231 - 2²¹ = 159079079 is a prime.

It is a super-2 number, since 2×161176231² = 51955554878730722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161176231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161176271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80588115 + 80588116.

It is an arithmetic number, because the mean of its divisors is an integer number (80588116).

Almost surely, 2^161176231 is an apocalyptic number.

161176231 is a deficient number, since it is larger than the sum of its proper divisors (1).

161176231 is an equidigital number, since it uses as much as digits as its factorization.

161176231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 28.

The square root of 161176231 is about 12695.5201153793. The cubic root of 161176231 is about 544.2106025243.

The spelling of 161176231 in words is "one hundred sixty-one million, one hundred seventy-six thousand, two hundred thirty-one".