161000051 has 8 divisors (see below), whose sum is σ = 164614464. Its totient is φ = 157393600.

The previous prime is 161000017. The next prime is 161000057. The reversal of 161000051 is 150000161.

161000051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-161000051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161000057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59831 + ... + 62463.

It is an arithmetic number, because the mean of its divisors is an integer number (20576808).

Almost surely, 2^161000051 is an apocalyptic number.

161000051 is a deficient number, since it is larger than the sum of its proper divisors (3614413).

161000051 is a wasteful number, since it uses less digits than its factorization.

161000051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3981.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 161000051 is about 12688.5795501309. The cubic root of 161000051 is about 544.0122399838.

The spelling of 161000051 in words is "one hundred sixty-one million, fifty-one", and thus it is an aban number.