161542582 has 4 divisors (see below), whose sum is σ = 242313876. Its totient is φ = 80771290.

The previous prime is 161542573. The next prime is 161542613. The reversal of 161542582 is 285245161.

It is a happy number.

161542582 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

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, 40385644 + ... + 40385647.

It is an arithmetic number, because the mean of its divisors is an integer number (60578469).

Almost surely, 2^161542582 is an apocalyptic number.

161542582 is a deficient number, since it is larger than the sum of its proper divisors (80771294).

161542582 is an equidigital number, since it uses as much as digits as its factorization.

161542582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80771293.

The product of its digits is 19200, while the sum is 34.

The square root of 161542582 is about 12709.9402831013. The cubic root of 161542582 is about 544.6226178509.

The spelling of 161542582 in words is "one hundred sixty-one million, five hundred forty-two thousand, five hundred eighty-two".