31845681451 has 2 divisors, whose sum is σ = 31845681452. Its totient is φ = 31845681450.

The previous prime is 31845681397. The next prime is 31845681473. The reversal of 31845681451 is 15418654813.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31845681451 - 2⁷ = 31845681323 is a prime.

It is not a weakly prime, because it can be changed into another prime (31845687451) 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 as a sum of consecutive naturals, namely, 15922840725 + 15922840726.

It is an arithmetic number, because the mean of its divisors is an integer number (15922840726).

Almost surely, 2^31845681451 is an apocalyptic number.

31845681451 is a deficient number, since it is larger than the sum of its proper divisors (1).

31845681451 is an equidigital number, since it uses as much as digits as its factorization.

31845681451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 460800, while the sum is 46.

The spelling of 31845681451 in words is "thirty-one billion, eight hundred forty-five million, six hundred eighty-one thousand, four hundred fifty-one".