31022742 has 16 divisors (see below), whose sum is σ = 62972352. Its totient is φ = 10186440.

The previous prime is 31022741. The next prime is 31022749. The reversal of 31022742 is 24722013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31022741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38184 + ... + 38987.

It is an arithmetic number, because the mean of its divisors is an integer number (3935772).

Almost surely, 2^31022742 is an apocalyptic number.

31022742 is an abundant number, since it is smaller than the sum of its proper divisors (31949610).

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

31022742 is a wasteful number, since it uses less digits than its factorization.

31022742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77243.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 31022742 is about 5569.8062802938. The cubic root of 31022742 is about 314.2148650411.

Adding to 31022742 its reverse (24722013), we get a palindrome (55744755).

The spelling of 31022742 in words is "thirty-one million, twenty-two thousand, seven hundred forty-two".