31631446045 has 16 divisors (see below), whose sum is σ = 38533321728. Its totient is φ = 24921610560.

The previous prime is 31631446043. The next prime is 31631446081. The reversal of 31631446045 is 54064413613.

It is not a de Polignac number, because 31631446045 - 2¹ = 31631446043 is a prime.

It is a super-2 number, since 2×31631446045² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31631445995 and 31631446013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31631446043) 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, 1915012 + ... + 1931458.

It is an arithmetic number, because the mean of its divisors is an integer number (2408332608).

Almost surely, 2^31631446045 is an apocalyptic number.

It is an amenable number.

31631446045 is a deficient number, since it is larger than the sum of its proper divisors (6901875683).

31631446045 is a wasteful number, since it uses less digits than its factorization.

31631446045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22260.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 31631446045 its reverse (54064413613), we get a palindrome (85695859658).

The spelling of 31631446045 in words is "thirty-one billion, six hundred thirty-one million, four hundred forty-six thousand, forty-five".