30503681 has 8 divisors (see below), whose sum is σ = 34278720. Its totient is φ = 26932752.

The previous prime is 30503663. The next prime is 30503723. The reversal of 30503681 is 18630503.

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 30503681 - 2⁶ = 30503617 is a prime.

It is a super-2 number, since 2×30503681² = 1860949109099522, 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 30503681.

It is not an unprimeable number, because it can be changed into a prime (30503981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50711 + ... + 51308.

It is an arithmetic number, because the mean of its divisors is an integer number (4284840).

Almost surely, 2^30503681 is an apocalyptic number.

It is an amenable number.

30503681 is a deficient number, since it is larger than the sum of its proper divisors (3775039).

30503681 is a wasteful number, since it uses less digits than its factorization.

30503681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102055.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 30503681 is about 5523.0137606202. The cubic root of 30503681 is about 312.4525572778.

The spelling of 30503681 in words is "thirty million, five hundred three thousand, six hundred eighty-one".