21425214527 has 2 divisors, whose sum is σ = 21425214528. Its totient is φ = 21425214526.

The previous prime is 21425214493. The next prime is 21425214533. The reversal of 21425214527 is 72541252412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21425214527 - 2¹⁸ = 21424952383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21425214227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10712607263 + 10712607264.

It is an arithmetic number, because the mean of its divisors is an integer number (10712607264).

Almost surely, 2^21425214527 is an apocalyptic number.

21425214527 is a deficient number, since it is larger than the sum of its proper divisors (1).

21425214527 is an equidigital number, since it uses as much as digits as its factorization.

21425214527 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44800, while the sum is 35.

Adding to 21425214527 its reverse (72541252412), we get a palindrome (93966466939).

The spelling of 21425214527 in words is "twenty-one billion, four hundred twenty-five million, two hundred fourteen thousand, five hundred twenty-seven".