31244022 has 32 divisors (see below), whose sum is σ = 70277760. Its totient is φ = 10287720.

The previous prime is 31243967. The next prime is 31244077. The reversal of 31244022 is 22044213.

It is an interprime number because it is at equal distance from previous prime (31243967) and next prime (31244077).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31243986 and 31244004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 997 + ... + 7967.

It is an arithmetic number, because the mean of its divisors is an integer number (2196180).

Almost surely, 2^31244022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31244022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35138880).

31244022 is an abundant number, since it is smaller than the sum of its proper divisors (39033738).

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

31244022 is a wasteful number, since it uses less digits than its factorization.

31244022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7065 (or 7059 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 31244022 is about 5589.6352296013. The cubic root of 31244022 is about 314.9601763714.

Adding to 31244022 its reverse (22044213), we get a palindrome (53288235).

The spelling of 31244022 in words is "thirty-one million, two hundred forty-four thousand, twenty-two".