161027515 has 32 divisors (see below), whose sum is σ = 220729536. Its totient is φ = 111720960.

The previous prime is 161027507. The next prime is 161027539. The reversal of 161027515 is 515720161.

161027515 = 1684² + 1685² + ... + 1738².

It is not a de Polignac number, because 161027515 - 2³ = 161027507 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107109 + ... + 108601.

It is an arithmetic number, because the mean of its divisors is an integer number (6897798).

Almost surely, 2^161027515 is an apocalyptic number.

161027515 is a deficient number, since it is larger than the sum of its proper divisors (59702021).

161027515 is a wasteful number, since it uses less digits than its factorization.

161027515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 161027515 is about 12689.6617370204. The cubic root of 161027515 is about 544.0431714495.

Adding to 161027515 its reverse (515720161), we get a palindrome (676747676).

The spelling of 161027515 in words is "one hundred sixty-one million, twenty-seven thousand, five hundred fifteen".