731342161 has 4 divisors (see below), whose sum is σ = 797827824. Its totient is φ = 664856500.

The previous prime is 731342153. The next prime is 731342179. The reversal of 731342161 is 161243137.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 731342161 - 2³ = 731342153 is a prime.

It is a super-2 number, since 2×731342161² = 1069722712912299842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731342191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33242815 + ... + 33242836.

It is an arithmetic number, because the mean of its divisors is an integer number (199456956).

Almost surely, 2^731342161 is an apocalyptic number.

It is an amenable number.

731342161 is a deficient number, since it is larger than the sum of its proper divisors (66485663).

731342161 is a wasteful number, since it uses less digits than its factorization.

731342161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66485662.

The product of its digits is 3024, while the sum is 28.

The square root of 731342161 is about 27043.3385697846. The cubic root of 731342161 is about 900.9628218672.

Adding to 731342161 its reverse (161243137), we get a palindrome (892585298).

The spelling of 731342161 in words is "seven hundred thirty-one million, three hundred forty-two thousand, one hundred sixty-one".