31481484 has 24 divisors (see below), whose sum is σ = 77778288. Its totient is φ = 9876480.

The previous prime is 31481479. The next prime is 31481497. The reversal of 31481484 is 48418413.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76957 + ... + 77364.

It is an arithmetic number, because the mean of its divisors is an integer number (3240762).

Almost surely, 2^31481484 is an apocalyptic number.

31481484 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31481484 is an abundant number, since it is smaller than the sum of its proper divisors (46296804).

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

31481484 is a wasteful number, since it uses less digits than its factorization.

31481484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154345 (or 154343 counting only the distinct ones).

The product of its digits is 12288, while the sum is 33.

The square root of 31481484 is about 5610.8363013013. The cubic root of 31481484 is about 315.7560874821.

Adding to 31481484 its reverse (48418413), we get a palindrome (79899897).

The spelling of 31481484 in words is "thirty-one million, four hundred eighty-one thousand, four hundred eighty-four".