33536251421 has 2 divisors, whose sum is σ = 33536251422. Its totient is φ = 33536251420.

The previous prime is 33536251337. The next prime is 33536251423. The reversal of 33536251421 is 12415263533.

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., 28405394521 + 5130856900 = 168539^2 + 71630^2 .

It is an emirp because it is prime and its reverse (12415263533) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33536251421 - 2²⁶ = 33469142557 is a prime.

It is a super-2 number, since 2×33536251421² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 33536251423, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33536251423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16768125710 + 16768125711.

It is an arithmetic number, because the mean of its divisors is an integer number (16768125711).

Almost surely, 2^33536251421 is an apocalyptic number.

It is an amenable number.

33536251421 is a deficient number, since it is larger than the sum of its proper divisors (1).

33536251421 is an equidigital number, since it uses as much as digits as its factorization.

33536251421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 35.

The spelling of 33536251421 in words is "thirty-three billion, five hundred thirty-six million, two hundred fifty-one thousand, four hundred twenty-one".