731230081 has 2 divisors, whose sum is σ = 731230082. Its totient is φ = 731230080.

The previous prime is 731230069. The next prime is 731230127. The reversal of 731230081 is 180032137.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 731215681 + 14400 = 27041^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 731230081 - 2¹³ = 731221889 is a prime.

It is a super-2 number, since 2×731230081² = 1069394862718533122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (731230481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365615040 + 365615041.

It is an arithmetic number, because the mean of its divisors is an integer number (365615041).

Almost surely, 2^731230081 is an apocalyptic number.

It is an amenable number.

731230081 is a deficient number, since it is larger than the sum of its proper divisors (1).

731230081 is an equidigital number, since it uses as much as digits as its factorization.

731230081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 731230081 is about 27041.2662610315. The cubic root of 731230081 is about 900.9167945869.

The spelling of 731230081 in words is "seven hundred thirty-one million, two hundred thirty thousand, eighty-one".