31425282 has 72 divisors (see below), whose sum is σ = 82757376. Its totient is φ = 8440704.

The previous prime is 31425223. The next prime is 31425287. The reversal of 31425282 is 28252413.

It is not an unprimeable number, because it can be changed into a prime (31425287) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 35983 + ... + 36845.

It is an arithmetic number, because the mean of its divisors is an integer number (1149408).

Almost surely, 2^31425282 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31425282, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41378688).

31425282 is an abundant number, since it is smaller than the sum of its proper divisors (51332094).

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

31425282 is a wasteful number, since it uses less digits than its factorization.

31425282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912 (or 892 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 31425282 is about 5605.8257197312. The cubic root of 31425282 is about 315.5680754380.

Adding to 31425282 its reverse (28252413), we get a palindrome (59677695).

The spelling of 31425282 in words is "thirty-one million, four hundred twenty-five thousand, two hundred eighty-two".