33346151981 has 2 divisors, whose sum is σ = 33346151982. Its totient is φ = 33346151980.

The previous prime is 33346151963. The next prime is 33346152041. The reversal of 33346151981 is 18915164333.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25125103081 + 8221048900 = 158509^2 + 90670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33346151981 is a prime.

It is a super-2 number, since 2×33346151981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33346151911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16673075990 + 16673075991.

It is an arithmetic number, because the mean of its divisors is an integer number (16673075991).

Almost surely, 2^33346151981 is an apocalyptic number.

It is an amenable number.

33346151981 is a deficient number, since it is larger than the sum of its proper divisors (1).

33346151981 is an equidigital number, since it uses as much as digits as its factorization.

33346151981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 44.

The spelling of 33346151981 in words is "thirty-three billion, three hundred forty-six million, one hundred fifty-one thousand, nine hundred eighty-one".