161306051 has 16 divisors (see below), whose sum is σ = 173644800. Its totient is φ = 149545440.

The previous prime is 161306027. The next prime is 161306063. The reversal of 161306051 is 150603161.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 161306051 - 2⁶ = 161305987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161306351) 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, 75800 + ... + 77898.

It is an arithmetic number, because the mean of its divisors is an integer number (10852800).

Almost surely, 2^161306051 is an apocalyptic number.

161306051 is a deficient number, since it is larger than the sum of its proper divisors (12338749).

161306051 is a wasteful number, since it uses less digits than its factorization.

161306051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2234.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 161306051 is about 12700.6319134128. The cubic root of 161306051 is about 544.3566754702.

The spelling of 161306051 in words is "one hundred sixty-one million, three hundred six thousand, fifty-one".