30312142 has 16 divisors (see below), whose sum is σ = 52623360. Its totient is φ = 12826008.

The previous prime is 30312127. The next prime is 30312151. The reversal of 30312142 is 24121303.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12598 + ... + 14809.

It is an arithmetic number, because the mean of its divisors is an integer number (3288960).

Almost surely, 2^30312142 is an apocalyptic number.

30312142 is a deficient number, since it is larger than the sum of its proper divisors (22311218).

30312142 is a wasteful number, since it uses less digits than its factorization.

30312142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27495.

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

The square root of 30312142 is about 5505.6463744051. The cubic root of 30312142 is about 311.7971986363.

Adding to 30312142 its reverse (24121303), we get a palindrome (54433445).

The spelling of 30312142 in words is "thirty million, three hundred twelve thousand, one hundred forty-two".