31421324 has 24 divisors (see below), whose sum is σ = 60469248. Its totient is φ = 14167440.

The previous prime is 31421311. The next prime is 31421329. The reversal of 31421324 is 42312413.

It is a junction number, because it is equal to n+sod(n) for n = 31421296 and 31421305.

It is not an unprimeable number, because it can be changed into a prime (31421329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2777 + ... + 8399.

It is an arithmetic number, because the mean of its divisors is an integer number (2519552).

Almost surely, 2^31421324 is an apocalyptic number.

It is an amenable number.

31421324 is a deficient number, since it is larger than the sum of its proper divisors (29047924).

31421324 is a wasteful number, since it uses less digits than its factorization.

31421324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5765 (or 5763 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 31421324 is about 5605.4726830126. The cubic root of 31421324 is about 315.5548263298.

Adding to 31421324 its reverse (42312413), we get a palindrome (73733737).

The spelling of 31421324 in words is "thirty-one million, four hundred twenty-one thousand, three hundred twenty-four".