31325481 has 32 divisors (see below), whose sum is σ = 52387200. Its totient is φ = 18325440.

The previous prime is 31325447. The next prime is 31325501. The reversal of 31325481 is 18452313.

It is a happy number.

It is not a de Polignac number, because 31325481 - 2¹³ = 31317289 is a prime.

It is a super-2 number, since 2×31325481² = 1962571519762722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (31325881) 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 31 ways as a sum of consecutive naturals, for example, 6795 + ... + 10431.

It is an arithmetic number, because the mean of its divisors is an integer number (1637100).

Almost surely, 2^31325481 is an apocalyptic number.

It is an amenable number.

31325481 is a deficient number, since it is larger than the sum of its proper divisors (21061719).

31325481 is a wasteful number, since it uses less digits than its factorization.

31325481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3686 (or 3680 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 31325481 is about 5596.9170978316. The cubic root of 31325481 is about 315.2336588346.

Adding to 31325481 its reverse (18452313), we get a palindrome (49777794).

The spelling of 31325481 in words is "thirty-one million, three hundred twenty-five thousand, four hundred eighty-one".