161333515 has 16 divisors (see below), whose sum is σ = 221803200. Its totient is φ = 110355840.

The previous prime is 161333507. The next prime is 161333531. The reversal of 161333515 is 515333161.

It is not a de Polignac number, because 161333515 - 2³ = 161333507 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9261 + ... + 20209.

It is an arithmetic number, because the mean of its divisors is an integer number (13862700).

Almost surely, 2^161333515 is an apocalyptic number.

161333515 is a deficient number, since it is larger than the sum of its proper divisors (60469685).

161333515 is a wasteful number, since it uses less digits than its factorization.

161333515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11382.

The product of its digits is 4050, while the sum is 28.

The square root of 161333515 is about 12701.7130734401. The cubic root of 161333515 is about 544.3875678086.

Adding to 161333515 its reverse (515333161), we get a palindrome (676666676).

The spelling of 161333515 in words is "one hundred sixty-one million, three hundred thirty-three thousand, five hundred fifteen".