33135952981 has 2 divisors, whose sum is σ = 33135952982. Its totient is φ = 33135952980.

The previous prime is 33135952957. The next prime is 33135953017. The reversal of 33135952981 is 18925953133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31423234756 + 1712718225 = 177266^2 + 41385^2 .

It is a cyclic number.

It is not a de Polignac number, because 33135952981 - 2¹⁹ = 33135428693 is a prime.

It is a super-2 number, since 2×33135952981² (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 (33135952901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16567976490 + 16567976491.

It is an arithmetic number, because the mean of its divisors is an integer number (16567976491).

Almost surely, 2^33135952981 is an apocalyptic number.

It is an amenable number.

33135952981 is a deficient number, since it is larger than the sum of its proper divisors (1).

33135952981 is an equidigital number, since it uses as much as digits as its factorization.

33135952981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 874800, while the sum is 49.

The spelling of 33135952981 in words is "thirty-three billion, one hundred thirty-five million, nine hundred fifty-two thousand, nine hundred eighty-one".