161403715 has 32 divisors (see below), whose sum is σ = 216437760. Its totient is φ = 115521120.

The previous prime is 161403707. The next prime is 161403733. The reversal of 161403715 is 517304161.

It is not a de Polignac number, because 161403715 - 2³ = 161403707 is a prime.

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, 525592 + ... + 525898.

It is an arithmetic number, because the mean of its divisors is an integer number (6763680).

Almost surely, 2^161403715 is an apocalyptic number.

161403715 is a deficient number, since it is larger than the sum of its proper divisors (55034045).

161403715 is an equidigital number, since it uses as much as digits as its factorization.

161403715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 161403715 is about 12704.4761796778. The cubic root of 161403715 is about 544.4665149629.

Adding to 161403715 its reverse (517304161), we get a palindrome (678707876).

The spelling of 161403715 in words is "one hundred sixty-one million, four hundred three thousand, seven hundred fifteen".