21225752633 has 2 divisors, whose sum is σ = 21225752634. Its totient is φ = 21225752632.

The previous prime is 21225752623. The next prime is 21225752711. The reversal of 21225752633 is 33625752212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17958144064 + 3267608569 = 134008^2 + 57163^2 .

It is a cyclic number.

It is not a de Polignac number, because 21225752633 - 2¹⁶ = 21225687097 is a prime.

It is not a weakly prime, because it can be changed into another prime (21225752623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10612876316 + 10612876317.

It is an arithmetic number, because the mean of its divisors is an integer number (10612876317).

Almost surely, 2^21225752633 is an apocalyptic number.

It is an amenable number.

21225752633 is a deficient number, since it is larger than the sum of its proper divisors (1).

21225752633 is an equidigital number, since it uses as much as digits as its factorization.

21225752633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 38.

The spelling of 21225752633 in words is "twenty-one billion, two hundred twenty-five million, seven hundred fifty-two thousand, six hundred thirty-three".