33996181631 has 2 divisors, whose sum is σ = 33996181632. Its totient is φ = 33996181630.

The previous prime is 33996181621. The next prime is 33996181649. The reversal of 33996181631 is 13618169933.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 33996181631 - 2¹⁸ = 33995919487 is a prime.

It is a super-2 number, since 2×33996181631² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33996181631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33996181621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16998090815 + 16998090816.

It is an arithmetic number, because the mean of its divisors is an integer number (16998090816).

Almost surely, 2^33996181631 is an apocalyptic number.

33996181631 is a deficient number, since it is larger than the sum of its proper divisors (1).

33996181631 is an equidigital number, since it uses as much as digits as its factorization.

33996181631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 50.

The spelling of 33996181631 in words is "thirty-three billion, nine hundred ninety-six million, one hundred eighty-one thousand, six hundred thirty-one".