31481446 has 16 divisors (see below), whose sum is σ = 48522240. Its totient is φ = 15311560.

The previous prime is 31481431. The next prime is 31481449. The reversal of 31481446 is 64418413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31481449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15891 + ... + 17761.

It is an arithmetic number, because the mean of its divisors is an integer number (3032640).

Almost surely, 2^31481446 is an apocalyptic number.

31481446 is a deficient number, since it is larger than the sum of its proper divisors (17040794).

31481446 is a wasteful number, since it uses less digits than its factorization.

31481446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099.

The product of its digits is 9216, while the sum is 31.

The square root of 31481446 is about 5610.8329149958. The cubic root of 31481446 is about 315.7559604367.

Adding to 31481446 its reverse (64418413), we get a palindrome (95899859).

The spelling of 31481446 in words is "thirty-one million, four hundred eighty-one thousand, four hundred forty-six".