31030242 has 16 divisors (see below), whose sum is σ = 62387712. Its totient is φ = 10288880.

The previous prime is 31030213. The next prime is 31030267. The reversal of 31030242 is 24203013.

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, 12393 + ... + 14684.

It is an arithmetic number, because the mean of its divisors is an integer number (3899232).

Almost surely, 2^31030242 is an apocalyptic number.

31030242 is an abundant number, since it is smaller than the sum of its proper divisors (31357470).

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

31030242 is a wasteful number, since it uses less digits than its factorization.

31030242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27273.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 31030242 is about 5570.4795125734. The cubic root of 31030242 is about 314.2401843333.

Adding to 31030242 its reverse (24203013), we get a palindrome (55233255).

The spelling of 31030242 in words is "thirty-one million, thirty thousand, two hundred forty-two".