161795151 has 40 divisors (see below), whose sum is σ = 280410240. Its totient is φ = 91053072.

The previous prime is 161795129. The next prime is 161795173. The reversal of 161795151 is 151597161.

161795151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161795129) and next prime (161795173).

It is not a de Polignac number, because 161795151 - 2¹⁵ = 161762383 is a prime.

It is a super-2 number, since 2×161795151² = 52355341774225602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161795351) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 35860 + ... + 40118.

It is an arithmetic number, because the mean of its divisors is an integer number (7010256).

Almost surely, 2^161795151 is an apocalyptic number.

161795151 is a deficient number, since it is larger than the sum of its proper divisors (118615089).

161795151 is an equidigital number, since it uses as much as digits as its factorization.

161795151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4345 (or 4336 counting only the distinct ones).

The product of its digits is 9450, while the sum is 36.

The square root of 161795151 is about 12719.8722870947. The cubic root of 161795151 is about 544.9063060325.

It can be divided in two parts, 16179515 and 1, that added together give a triangular number (16179516 = T₅₆₈₈).

The spelling of 161795151 in words is "one hundred sixty-one million, seven hundred ninety-five thousand, one hundred fifty-one".