161187315 has 16 divisors (see below), whose sum is σ = 262129056. Its totient is φ = 84556800.

The previous prime is 161187311. The next prime is 161187329. The reversal of 161187315 is 513781161.

It is not a de Polignac number, because 161187315 - 2² = 161187311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161187311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87166 + ... + 88995.

It is an arithmetic number, because the mean of its divisors is an integer number (16383066).

Almost surely, 2^161187315 is an apocalyptic number.

161187315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161187315 is a deficient number, since it is larger than the sum of its proper divisors (100941741).

161187315 is a wasteful number, since it uses less digits than its factorization.

161187315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176230.

The product of its digits is 5040, while the sum is 33.

The square root of 161187315 is about 12695.9566398125. The cubic root of 161187315 is about 544.2230772587.

The spelling of 161187315 in words is "one hundred sixty-one million, one hundred eighty-seven thousand, three hundred fifteen".