31421412 has 48 divisors (see below), whose sum is σ = 88872000. Its totient is φ = 9521280.

The previous prime is 31421387. The next prime is 31421417. The reversal of 31421412 is 21412413.

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (31421417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12037 + ... + 14412.

It is an arithmetic number, because the mean of its divisors is an integer number (1851500).

Almost surely, 2^31421412 is an apocalyptic number.

It is an amenable number.

31421412 is an abundant number, since it is smaller than the sum of its proper divisors (57450588).

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

31421412 is a wasteful number, since it uses less digits than its factorization.

31421412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26473 (or 26465 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 31421412 is about 5605.4805324789. The cubic root of 31421412 is about 315.5551209153. Note that the first 3 decimals are identical.

Adding to 31421412 its reverse (21412413), we get a palindrome (52833825).

It can be divided in two parts, 3142 and 1412, that added together give a palindrome (4554).

The spelling of 31421412 in words is "thirty-one million, four hundred twenty-one thousand, four hundred twelve".