31631421445 has 16 divisors (see below), whose sum is σ = 43028979840. Its totient is φ = 22129187904.

The previous prime is 31631421373. The next prime is 31631421457. The reversal of 31631421445 is 54412413613.

It is a cyclic number.

It is not a de Polignac number, because 31631421445 - 2⁷ = 31631421317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31631421445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12805009 + ... + 12807478.

It is an arithmetic number, because the mean of its divisors is an integer number (2689311240).

Almost surely, 2^31631421445 is an apocalyptic number.

It is an amenable number.

31631421445 is a deficient number, since it is larger than the sum of its proper divisors (11397558395).

31631421445 is a wasteful number, since it uses less digits than its factorization.

31631421445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25612524.

The product of its digits is 34560, while the sum is 34.

The spelling of 31631421445 in words is "thirty-one billion, six hundred thirty-one million, four hundred twenty-one thousand, four hundred forty-five".