31355412 has 96 divisors (see below), whose sum is σ = 86002560. Its totient is φ = 8785920.

The previous prime is 31355407. The next prime is 31355413. The reversal of 31355412 is 21455313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31355413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199638 + ... + 199794.

It is an arithmetic number, because the mean of its divisors is an integer number (895860).

Almost surely, 2^31355412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31355412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43001280).

31355412 is an abundant number, since it is smaller than the sum of its proper divisors (54647148).

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

31355412 is a wasteful number, since it uses less digits than its factorization.

31355412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 279 counting only the distinct ones).

The product of its digits is 1800, while the sum is 24.

The square root of 31355412 is about 5599.5903421590. The cubic root of 31355412 is about 315.3340271275.

Subtracting from 31355412 its reverse (21455313), we obtain a palindrome (9900099).

The spelling of 31355412 in words is "thirty-one million, three hundred fifty-five thousand, four hundred twelve".