21422555471 has 2 divisors, whose sum is σ = 21422555472. Its totient is φ = 21422555470.

The previous prime is 21422555431. The next prime is 21422555501. The reversal of 21422555471 is 17455522412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21422555471 - 2¹⁴ = 21422539087 is a prime.

It is a super-3 number, since 3×21422555471³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21422555431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10711277735 + 10711277736.

It is an arithmetic number, because the mean of its divisors is an integer number (10711277736).

Almost surely, 2^21422555471 is an apocalyptic number.

21422555471 is a deficient number, since it is larger than the sum of its proper divisors (1).

21422555471 is an equidigital number, since it uses as much as digits as its factorization.

21422555471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112000, while the sum is 38.

The spelling of 21422555471 in words is "twenty-one billion, four hundred twenty-two million, five hundred fifty-five thousand, four hundred seventy-one".