30131242 has 32 divisors (see below), whose sum is σ = 50948352. Its totient is φ = 13288704.

The previous prime is 30131201. The next prime is 30131243. The reversal of 30131242 is 24213103.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (30131243) 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, 41083 + ... + 41809.

It is an arithmetic number, because the mean of its divisors is an integer number (1592136).

Almost surely, 2^30131242 is an apocalyptic number.

30131242 is a deficient number, since it is larger than the sum of its proper divisors (20817110).

30131242 is a wasteful number, since it uses less digits than its factorization.

30131242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822.

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

The square root of 30131242 is about 5489.1932011909. The cubic root of 30131242 is about 311.1757019047.

Adding to 30131242 its reverse (24213103), we get a palindrome (54344345).

The spelling of 30131242 in words is "thirty million, one hundred thirty-one thousand, two hundred forty-two".