33971482381 has 16 divisors (see below), whose sum is σ = 37034308080. Its totient is φ = 31034859520.

The previous prime is 33971482373. The next prime is 33971482409. The reversal of 33971482381 is 18328417933.

It can be written as a sum of positive squares in 8 ways, for example, as 8966385481 + 25005096900 = 94691^2 + 158130^2 .

It is a cyclic number.

It is not a de Polignac number, because 33971482381 - 2³ = 33971482373 is a prime.

It is a super-3 number, since 3×33971482381³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33971482481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13605 + ... + 261013.

It is an arithmetic number, because the mean of its divisors is an integer number (2314644255).

Almost surely, 2^33971482381 is an apocalyptic number.

It is an amenable number.

33971482381 is a deficient number, since it is larger than the sum of its proper divisors (3062825699).

33971482381 is a wasteful number, since it uses less digits than its factorization.

33971482381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247664.

The product of its digits is 870912, while the sum is 49.

The spelling of 33971482381 in words is "thirty-three billion, nine hundred seventy-one million, four hundred eighty-two thousand, three hundred eighty-one".