31432122 has 36 divisors (see below), whose sum is σ = 71214234. Its totient is φ = 10018800.

The previous prime is 31432111. The next prime is 31432153. The reversal of 31432122 is 22123413.

It can be written as a sum of positive squares in only one way, i.e., 29713401 + 1718721 = 5451^2 + 1311^2 .

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 = 31432095 and 31432104.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7872 + ... + 11172.

Almost surely, 2^31432122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31432122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35607117).

31432122 is an abundant number, since it is smaller than the sum of its proper divisors (39782112).

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

31432122 is a wasteful number, since it uses less digits than its factorization.

31432122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355 (or 3329 counting only the distinct ones).

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

The square root of 31432122 is about 5606.4357661530. The cubic root of 31432122 is about 315.5909692029.

Adding to 31432122 its reverse (22123413), we get a palindrome (53555535).

The spelling of 31432122 in words is "thirty-one million, four hundred thirty-two thousand, one hundred twenty-two".