161313051 has 24 divisors (see below), whose sum is σ = 235922544. Its totient is φ = 97699840.

The previous prime is 161313049. The next prime is 161313091. The reversal of 161313051 is 150313161.

It is not a de Polignac number, because 161313051 - 2¹ = 161313049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161313041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41011 + ... + 44771.

It is an arithmetic number, because the mean of its divisors is an integer number (9830106).

Almost surely, 2^161313051 is an apocalyptic number.

161313051 is a deficient number, since it is larger than the sum of its proper divisors (74609493).

161313051 is a wasteful number, since it uses less digits than its factorization.

161313051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3839 (or 3810 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 161313051 is about 12700.9074872625. The cubic root of 161313051 is about 544.3645496150.

The spelling of 161313051 in words is "one hundred sixty-one million, three hundred thirteen thousand, fifty-one".