33139256321 has 2 divisors, whose sum is σ = 33139256322. Its totient is φ = 33139256320.

The previous prime is 33139256287. The next prime is 33139256327. The reversal of 33139256321 is 12365293133.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20956615696 + 12182640625 = 144764^2 + 110375^2 .

It is a cyclic number.

It is not a de Polignac number, because 33139256321 - 2⁶ = 33139256257 is a prime.

It is not a weakly prime, because it can be changed into another prime (33139256327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16569628160 + 16569628161.

It is an arithmetic number, because the mean of its divisors is an integer number (16569628161).

Almost surely, 2^33139256321 is an apocalyptic number.

It is an amenable number.

33139256321 is a deficient number, since it is larger than the sum of its proper divisors (1).

33139256321 is an equidigital number, since it uses as much as digits as its factorization.

33139256321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 38.

The spelling of 33139256321 in words is "thirty-three billion, one hundred thirty-nine million, two hundred fifty-six thousand, three hundred twenty-one".