161534771 has 8 divisors (see below), whose sum is σ = 165142704. Its totient is φ = 157957920.

The previous prime is 161534767. The next prime is 161534801. The reversal of 161534771 is 177435161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161534771 - 2² = 161534767 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161534701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2900 + ... + 18206.

It is an arithmetic number, because the mean of its divisors is an integer number (20642838).

Almost surely, 2^161534771 is an apocalyptic number.

161534771 is a deficient number, since it is larger than the sum of its proper divisors (3607933).

161534771 is a wasteful number, since it uses less digits than its factorization.

161534771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15541.

The product of its digits is 17640, while the sum is 35.

The square root of 161534771 is about 12709.6330002089. The cubic root of 161534771 is about 544.6138397405.

It can be divided in two parts, 1615 and 34771, that multiplied together give a palindrome (56155165).

The spelling of 161534771 in words is "one hundred sixty-one million, five hundred thirty-four thousand, seven hundred seventy-one".