161516122 has 8 divisors (see below), whose sum is σ = 246845556. Its totient is φ = 79234272.

The previous prime is 161516101. The next prime is 161516123. The reversal of 161516122 is 221615161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 157025961 + 4490161 = 12531^2 + 2119^2 .

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

It is not an unprimeable number, because it can be changed into a prime (161516123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 761763 + ... + 761974.

Almost surely, 2^161516122 is an apocalyptic number.

161516122 is a deficient number, since it is larger than the sum of its proper divisors (85329434).

161516122 is a wasteful number, since it uses less digits than its factorization.

161516122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523792.

The product of its digits is 720, while the sum is 25.

The square root of 161516122 is about 12708.8993229154. The cubic root of 161516122 is about 544.5928805908.

The spelling of 161516122 in words is "one hundred sixty-one million, five hundred sixteen thousand, one hundred twenty-two".