31222026 has 48 divisors (see below), whose sum is σ = 74400768. Its totient is φ = 9384000.

The previous prime is 31222021. The next prime is 31222091. The reversal of 31222026 is 62022213.

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

It is not an unprimeable number, because it can be changed into a prime (31222021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26551 + ... + 27701.

It is an arithmetic number, because the mean of its divisors is an integer number (1550016).

Almost surely, 2^31222026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31222026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37200384).

31222026 is an abundant number, since it is smaller than the sum of its proper divisors (43178742).

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

31222026 is a wasteful number, since it uses less digits than its factorization.

31222026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307 (or 1304 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 31222026 is about 5587.6673129312. The cubic root of 31222026 is about 314.8862476646.

Adding to 31222026 its reverse (62022213), we get a palindrome (93244239).

The spelling of 31222026 in words is "thirty-one million, two hundred twenty-two thousand, twenty-six".