30681801 has 8 divisors (see below), whose sum is σ = 45454560. Its totient is φ = 20454516.

The previous prime is 30681773. The next prime is 30681809. The reversal of 30681801 is 10818603.

It is a de Polignac number, because none of the positive numbers 2^k-30681801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1136363 = 30681801 / (3 + 0 + 6 + 8 + 1 + 8 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (30681809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 568155 + ... + 568208.

It is an arithmetic number, because the mean of its divisors is an integer number (5681820).

Almost surely, 2^30681801 is an apocalyptic number.

It is an amenable number.

30681801 is a deficient number, since it is larger than the sum of its proper divisors (14772759).

30681801 is a wasteful number, since it uses less digits than its factorization.

30681801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136372 (or 1136366 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 30681801 is about 5539.1155431170. The cubic root of 30681801 is about 313.0595449257.

The spelling of 30681801 in words is "thirty million, six hundred eighty-one thousand, eight hundred one".