30743081 has 4 divisors (see below), whose sum is σ = 30754500. Its totient is φ = 30731664.

The previous prime is 30743051. The next prime is 30743093. The reversal of 30743081 is 18034703.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4477456 + 26265625 = 2116^2 + 5125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30743081 is a prime.

It is a super-2 number, since 2×30743081² = 1890274058745122, 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 30743081.

It is not an unprimeable number, because it can be changed into a prime (30743051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815 + ... + 7883.

It is an arithmetic number, because the mean of its divisors is an integer number (7688625).

Almost surely, 2^30743081 is an apocalyptic number.

It is an amenable number.

30743081 is a deficient number, since it is larger than the sum of its proper divisors (11419).

30743081 is an equidigital number, since it uses as much as digits as its factorization.

30743081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11418.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 30743081 is about 5544.6443528868. The cubic root of 30743081 is about 313.2678283417.

Adding to 30743081 its reverse (18034703), we get a palindrome (48777784).

The spelling of 30743081 in words is "thirty million, seven hundred forty-three thousand, eighty-one".