161547115 has 4 divisors (see below), whose sum is σ = 193856544. Its totient is φ = 129237688.

The previous prime is 161547109. The next prime is 161547119. The reversal of 161547115 is 511745161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 511745161 = 15731 ⋅32531.

It is a cyclic number.

It is not a de Polignac number, because 161547115 - 2⁵ = 161547083 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161547119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16154707 + ... + 16154716.

It is an arithmetic number, because the mean of its divisors is an integer number (48464136).

Almost surely, 2^161547115 is an apocalyptic number.

161547115 is a deficient number, since it is larger than the sum of its proper divisors (32309429).

161547115 is an equidigital number, since it uses as much as digits as its factorization.

161547115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32309428.

The product of its digits is 4200, while the sum is 31.

The square root of 161547115 is about 12710.1186068423. The cubic root of 161547115 is about 544.6277119695.

The spelling of 161547115 in words is "one hundred sixty-one million, five hundred forty-seven thousand, one hundred fifteen".