30216213 has 16 divisors (see below), whose sum is σ = 47121600. Its totient is φ = 19083600.

The previous prime is 30216203. The next prime is 30216223. The reversal of 30216213 is 31261203.

Added to its reverse (31261203) it gives a triangular number (61477416 = T₁₁₀₈₈).

It is an interprime number because it is at equal distance from previous prime (30216203) and next prime (30216223).

It is not a de Polignac number, because 30216213 - 2⁶ = 30216149 is a prime.

It is a super-2 number, since 2×30216213² = 1826039056122738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30216203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28938 + ... + 29963.

It is an arithmetic number, because the mean of its divisors is an integer number (2945100).

Almost surely, 2^30216213 is an apocalyptic number.

It is an amenable number.

30216213 is a deficient number, since it is larger than the sum of its proper divisors (16905387).

30216213 is a wasteful number, since it uses less digits than its factorization.

30216213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58929 (or 58923 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 30216213 is about 5496.9275963942. The cubic root of 30216213 is about 311.4679356236.

Adding to 30216213 its reverse (31261203), we get a palindrome (61477416).

The spelling of 30216213 in words is "thirty million, two hundred sixteen thousand, two hundred thirteen".