73105531 has 4 divisors (see below), whose sum is σ = 73186000. Its totient is φ = 73025064.

The previous prime is 73105499. The next prime is 73105541. The reversal of 73105531 is 13550137.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 73105531 - 2⁵ = 73105499 is a prime.

It is a super-2 number, since 2×73105531² = 10688837325583922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73105496 and 73105505.

It is not an unprimeable number, because it can be changed into a prime (73105541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38856 + ... + 40693.

It is an arithmetic number, because the mean of its divisors is an integer number (18296500).

Almost surely, 2^73105531 is an apocalyptic number.

73105531 is a deficient number, since it is larger than the sum of its proper divisors (80469).

73105531 is an equidigital number, since it uses as much as digits as its factorization.

73105531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80468.

The product of its (nonzero) digits is 1575, while the sum is 25.

The square root of 73105531 is about 8550.1772496247. The cubic root of 73105531 is about 418.1352152927.

Adding to 73105531 its reverse (13550137), we get a palindrome (86655668).

The spelling of 73105531 in words is "seventy-three million, one hundred five thousand, five hundred thirty-one".