731566081 has 8 divisors (see below), whose sum is σ = 734107104. Its totient is φ = 729030720.

The previous prime is 731566079. The next prime is 731566091. The reversal of 731566081 is 180665137.

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 731566081 - 2¹ = 731566079 is a prime.

It is a super-2 number, since 2×731566081² = 1070377861739397122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 731566081.

It is not an unprimeable number, because it can be changed into a prime (731566021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536841 + ... + 538201.

It is an arithmetic number, because the mean of its divisors is an integer number (91763388).

Almost surely, 2^731566081 is an apocalyptic number.

It is an amenable number.

731566081 is a deficient number, since it is larger than the sum of its proper divisors (2541023).

731566081 is a wasteful number, since it uses less digits than its factorization.

731566081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 731566081 is about 27047.4782743235. The cubic root of 731566081 is about 901.0547637879.

The spelling of 731566081 in words is "seven hundred thirty-one million, five hundred sixty-six thousand, eighty-one".