30109212 has 48 divisors (see below), whose sum is σ = 89214720. Its totient is φ = 8602416.

The previous prime is 30109201. The next prime is 30109223. The reversal of 30109212 is 21290103.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30109201) and next prime (30109223).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19158 + ... + 20669.

It is an arithmetic number, because the mean of its divisors is an integer number (1858640).

Almost surely, 2^30109212 is an apocalyptic number.

It is an amenable number.

30109212 is an abundant number, since it is smaller than the sum of its proper divisors (59105508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30109212 is a wasteful number, since it uses less digits than its factorization.

30109212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39847 (or 39839 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 30109212 is about 5487.1861641464. The cubic root of 30109212 is about 311.0998462852.

Adding to 30109212 its reverse (21290103), we get a palindrome (51399315).

The spelling of 30109212 in words is "thirty million, one hundred nine thousand, two hundred twelve".