161473534 has 4 divisors (see below), whose sum is σ = 242210304. Its totient is φ = 80736766.

The previous prime is 161473523. The next prime is 161473541. The reversal of 161473534 is 435374161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 435374161 = 127 ⋅3428143.

It is a self number, because there is not a number n which added to its sum of digits gives 161473534.

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, 40368382 + ... + 40368385.

It is an arithmetic number, because the mean of its divisors is an integer number (60552576).

Almost surely, 2^161473534 is an apocalyptic number.

161473534 is a deficient number, since it is larger than the sum of its proper divisors (80736770).

161473534 is an equidigital number, since it uses as much as digits as its factorization.

161473534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80736769.

The product of its digits is 30240, while the sum is 34.

The square root of 161473534 is about 12707.2236936319. The cubic root of 161473534 is about 544.5450109414.

The spelling of 161473534 in words is "one hundred sixty-one million, four hundred seventy-three thousand, five hundred thirty-four".