30219681 has 8 divisors (see below), whose sum is σ = 40318560. Its totient is φ = 20133632.

The previous prime is 30219667. The next prime is 30219691. The reversal of 30219681 is 18691203.

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 30219681 - 2⁵ = 30219649 is a prime.

It is a super-2 number, since 2×30219681² = 1826458239483522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30219601) 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 7 ways as a sum of consecutive naturals, for example, 6430 + ... + 10088.

It is an arithmetic number, because the mean of its divisors is an integer number (5039820).

Almost surely, 2^30219681 is an apocalyptic number.

It is an amenable number.

30219681 is a deficient number, since it is larger than the sum of its proper divisors (10098879).

30219681 is a wasteful number, since it uses less digits than its factorization.

30219681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6415.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 30219681 is about 5497.2430362865. The cubic root of 30219681 is about 311.4798511856.

The spelling of 30219681 in words is "thirty million, two hundred nineteen thousand, six hundred eighty-one".