30521223 has 12 divisors (see below), whose sum is σ = 44160480. Its totient is φ = 20313216.

The previous prime is 30521209. The next prime is 30521243. The reversal of 30521223 is 32212503.

It is not a de Polignac number, because 30521223 - 2⁶ = 30521159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30521196 and 30521205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30521243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3538 + ... + 8576.

It is an arithmetic number, because the mean of its divisors is an integer number (3680040).

Almost surely, 2^30521223 is an apocalyptic number.

30521223 is a deficient number, since it is larger than the sum of its proper divisors (13639257).

30521223 is a wasteful number, since it uses less digits than its factorization.

30521223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5718 (or 5715 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 30521223 is about 5524.6016145963. The cubic root of 30521223 is about 312.5124406781.

Adding to 30521223 its reverse (32212503), we get a palindrome (62733726).

It can be divided in two parts, 305 and 21223, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 30521223 in words is "thirty million, five hundred twenty-one thousand, two hundred twenty-three".