31020242 has 16 divisors (see below), whose sum is σ = 50846400. Its totient is φ = 14076240.

The previous prime is 31020233. The next prime is 31020247. The reversal of 31020242 is 24202013.

It is not an unprimeable number, because it can be changed into a prime (31020247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22859 + ... + 24177.

It is an arithmetic number, because the mean of its divisors is an integer number (3177900).

Almost surely, 2^31020242 is an apocalyptic number.

31020242 is a deficient number, since it is larger than the sum of its proper divisors (19826158).

31020242 is a wasteful number, since it uses less digits than its factorization.

31020242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 31020242 is about 5569.5818514499. The cubic root of 31020242 is about 314.2064243702.

Adding to 31020242 its reverse (24202013), we get a palindrome (55222255).

The spelling of 31020242 in words is "thirty-one million, twenty thousand, two hundred forty-two".