31432422 has 96 divisors (see below), whose sum is σ = 81751680. Its totient is φ = 7983360.

The previous prime is 31432411. The next prime is 31432483. The reversal of 31432422 is 22423413.

It is a super-4 number, since 4×31432422⁴ (a number of 31 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 94797 + ... + 95127.

It is an arithmetic number, because the mean of its divisors is an integer number (851580).

Almost surely, 2^31432422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31432422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40875840).

31432422 is an abundant number, since it is smaller than the sum of its proper divisors (50319258).

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

31432422 is a wasteful number, since it uses less digits than its factorization.

31432422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 379 counting only the distinct ones).

The product of its digits is 1152, while the sum is 21.

The square root of 31432422 is about 5606.4625210555. The cubic root of 31432422 is about 315.5919732393.

Adding to 31432422 its reverse (22423413), we get a palindrome (53855835).

Subtracting from 31432422 its reverse (22423413), we obtain a palindrome (9009009).

It can be divided in two parts, 3143 and 2422, that added together give a triangular number (5565 = T₁₀₅).

The spelling of 31432422 in words is "thirty-one million, four hundred thirty-two thousand, four hundred twenty-two".