73531331 has 2 divisors, whose sum is σ = 73531332. Its totient is φ = 73531330.

The previous prime is 73531313. The next prime is 73531343. The reversal of 73531331 is 13313537.

Together with previous prime (73531313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73531331 - 2⁶ = 73531267 is a prime.

It is a super-2 number, since 2×73531331² = 10813713277263122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 73531331.

It is not a weakly prime, because it can be changed into another prime (73531531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36765665 + 36765666.

It is an arithmetic number, because the mean of its divisors is an integer number (36765666).

Almost surely, 2^73531331 is an apocalyptic number.

73531331 is a deficient number, since it is larger than the sum of its proper divisors (1).

73531331 is an equidigital number, since it uses as much as digits as its factorization.

73531331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2835, while the sum is 26.

The square root of 73531331 is about 8575.0411660819. The cubic root of 73531331 is about 418.9454477540.

Adding to 73531331 its reverse (13313537), we get a palindrome (86844868).

The spelling of 73531331 in words is "seventy-three million, five hundred thirty-one thousand, three hundred thirty-one".