161205038 has 4 divisors (see below), whose sum is σ = 241807560. Its totient is φ = 80602518.

The previous prime is 161205029. The next prime is 161205043. The reversal of 161205038 is 830502161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 830502161 = 26981 ⋅30781.

It is a junction number, because it is equal to n+sod(n) for n = 161204998 and 161205016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40301258 + ... + 40301261.

It is an arithmetic number, because the mean of its divisors is an integer number (60451890).

Almost surely, 2^161205038 is an apocalyptic number.

161205038 is a deficient number, since it is larger than the sum of its proper divisors (80602522).

161205038 is an equidigital number, since it uses as much as digits as its factorization.

161205038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80602521.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 161205038 is about 12696.6545987516. The cubic root of 161205038 is about 544.2430228153.

Adding to 161205038 its reverse (830502161), we get a palindrome (991707199).

The spelling of 161205038 in words is "one hundred sixty-one million, two hundred five thousand, thirty-eight".