731500532161 has 12 divisors (see below), whose sum is σ = 873927278868. Its totient is φ = 610054496352.

The previous prime is 731500532143. The next prime is 731500532179. The reversal of 731500532161 is 161235005137.

It is an interprime number because it is at equal distance from previous prime (731500532143) and next prime (731500532179).

It can be written as a sum of positive squares in 2 ways, for example, as 334380001536 + 397120530625 = 578256^2 + 630175^2 .

It is not a de Polignac number, because 731500532161 - 2²³ = 731492143553 is a prime.

It is a super-3 number, since 3×731500532161³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (731500532131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201735786 + ... + 201739411.

It is an arithmetic number, because the mean of its divisors is an integer number (72827273239).

Almost surely, 2^731500532161 is an apocalyptic number.

It is an amenable number.

731500532161 is a deficient number, since it is larger than the sum of its proper divisors (142426746707).

731500532161 is a wasteful number, since it uses less digits than its factorization.

731500532161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403475248 (or 403475241 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 34.

Adding to 731500532161 its reverse (161235005137), we get a palindrome (892735537298).

The spelling of 731500532161 in words is "seven hundred thirty-one billion, five hundred million, five hundred thirty-two thousand, one hundred sixty-one".