161223514 has 16 divisors (see below), whose sum is σ = 252626688. Its totient is φ = 77022352.

The previous prime is 161223511. The next prime is 161223523. The reversal of 161223514 is 415322161.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (161223511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67224 + ... + 69580.

It is an arithmetic number, because the mean of its divisors is an integer number (15789168).

Almost surely, 2^161223514 is an apocalyptic number.

161223514 is a deficient number, since it is larger than the sum of its proper divisors (91403174).

161223514 is a wasteful number, since it uses less digits than its factorization.

161223514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3869.

The product of its digits is 1440, while the sum is 25.

The square root of 161223514 is about 12697.3821711406. The cubic root of 161223514 is about 544.2638142456.

Adding to 161223514 its reverse (415322161), we get a palindrome (576545675).

The spelling of 161223514 in words is "one hundred sixty-one million, two hundred twenty-three thousand, five hundred fourteen".