30142312 has 16 divisors (see below), whose sum is σ = 57831840. Its totient is φ = 14720496.

The previous prime is 30142297. The next prime is 30142313. The reversal of 30142312 is 21324103.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (30142313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43468 + ... + 44155.

It is an arithmetic number, because the mean of its divisors is an integer number (3614490).

Almost surely, 2^30142312 is an apocalyptic number.

It is an amenable number.

30142312 is a deficient number, since it is larger than the sum of its proper divisors (27689528).

30142312 is a wasteful number, since it uses less digits than its factorization.

30142312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87672 (or 87668 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 30142312 is about 5490.2014534988. The cubic root of 30142312 is about 311.2138051383.

Adding to 30142312 its reverse (21324103), we get a palindrome (51466415).

The spelling of 30142312 in words is "thirty million, one hundred forty-two thousand, three hundred twelve".