30822921 has 48 divisors (see below), whose sum is σ = 51891840. Its totient is φ = 17487360.

The previous prime is 30822917. The next prime is 30822923. The reversal of 30822921 is 12922803.

It is a happy number.

It is not a de Polignac number, because 30822921 - 2² = 30822917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30822923) 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 47 ways as a sum of consecutive naturals, for example, 66631 + ... + 67091.

It is an arithmetic number, because the mean of its divisors is an integer number (1081080).

Almost surely, 2^30822921 is an apocalyptic number.

It is an amenable number.

30822921 is a deficient number, since it is larger than the sum of its proper divisors (21068919).

30822921 is a wasteful number, since it uses less digits than its factorization.

30822921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 30822921 is about 5551.8394249114. The cubic root of 30822921 is about 313.5387801816.

The spelling of 30822921 in words is "thirty million, eight hundred twenty-two thousand, nine hundred twenty-one".