21552622753 has 2 divisors, whose sum is σ = 21552622754. Its totient is φ = 21552622752.

The previous prime is 21552622747. The next prime is 21552622759. The reversal of 21552622753 is 35722625512.

It is a balanced prime because it is at equal distance from previous prime (21552622747) and next prime (21552622759).

It can be written as a sum of positive squares in only one way, i.e., 17819046144 + 3733576609 = 133488^2 + 61103^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21552622753 is a prime.

It is not a weakly prime, because it can be changed into another prime (21552622759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10776311376 + 10776311377.

It is an arithmetic number, because the mean of its divisors is an integer number (10776311377).

Almost surely, 2^21552622753 is an apocalyptic number.

It is an amenable number.

21552622753 is a deficient number, since it is larger than the sum of its proper divisors (1).

21552622753 is an equidigital number, since it uses as much as digits as its factorization.

21552622753 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252000, while the sum is 40.

The spelling of 21552622753 in words is "twenty-one billion, five hundred fifty-two million, six hundred twenty-two thousand, seven hundred fifty-three".