161719151 has 16 divisors (see below), whose sum is σ = 180845568. Its totient is φ = 143354400.

The previous prime is 161719123. The next prime is 161719169. The reversal of 161719151 is 151917161.

It is a cyclic number.

It is not a de Polignac number, because 161719151 - 2¹⁴ = 161702767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161719121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217286 + ... + 218028.

It is an arithmetic number, because the mean of its divisors is an integer number (11302848).

Almost surely, 2^161719151 is an apocalyptic number.

161719151 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

161719151 is a deficient number, since it is larger than the sum of its proper divisors (19126417).

161719151 is a wasteful number, since it uses less digits than its factorization.

161719151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222.

The product of its digits is 1890, while the sum is 32.

The square root of 161719151 is about 12716.8844848099. The cubic root of 161719151 is about 544.8209730976.

The spelling of 161719151 in words is "one hundred sixty-one million, seven hundred nineteen thousand, one hundred fifty-one".