31244742 has 24 divisors (see below), whose sum is σ = 71679816. Its totient is φ = 9802176.

The previous prime is 31244729. The next prime is 31244771. The reversal of 31244742 is 24744213.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 50748 + ... + 51359.

It is an arithmetic number, because the mean of its divisors is an integer number (2986659).

Almost surely, 2^31244742 is an apocalyptic number.

31244742 is an abundant number, since it is smaller than the sum of its proper divisors (40435074).

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

31244742 is a wasteful number, since it uses less digits than its factorization.

31244742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102132 (or 102129 counting only the distinct ones).

The product of its digits is 5376, while the sum is 27.

The square root of 31244742 is about 5589.6996341485. The cubic root of 31244742 is about 314.9625957098.

Adding to 31244742 its reverse (24744213), we get a palindrome (55988955).

It can be divided in two parts, 312 and 44742, that added together give a palindrome (45054).

The spelling of 31244742 in words is "thirty-one million, two hundred forty-four thousand, seven hundred forty-two".