21525522311 has 2 divisors, whose sum is σ = 21525522312. Its totient is φ = 21525522310.

The previous prime is 21525522269. The next prime is 21525522353. The reversal of 21525522311 is 11322552512.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (21525522269) and next prime (21525522353).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21525522311 is a prime.

It is a super-2 number, since 2×21525522311² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21525522911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10762761155 + 10762761156.

It is an arithmetic number, because the mean of its divisors is an integer number (10762761156).

Almost surely, 2^21525522311 is an apocalyptic number.

21525522311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21525522311 is an equidigital number, since it uses as much as digits as its factorization.

21525522311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6000, while the sum is 29.

The spelling of 21525522311 in words is "twenty-one billion, five hundred twenty-five million, five hundred twenty-two thousand, three hundred eleven".