21615096271 has 2 divisors, whose sum is σ = 21615096272. Its totient is φ = 21615096270.

The previous prime is 21615096253. The next prime is 21615096277. The reversal of 21615096271 is 17269051612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21615096271 - 2¹⁷ = 21614965199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21615096277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10807548135 + 10807548136.

It is an arithmetic number, because the mean of its divisors is an integer number (10807548136).

Almost surely, 2^21615096271 is an apocalyptic number.

21615096271 is a deficient number, since it is larger than the sum of its proper divisors (1).

21615096271 is an equidigital number, since it uses as much as digits as its factorization.

21615096271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 21615096271 in words is "twenty-one billion, six hundred fifteen million, ninety-six thousand, two hundred seventy-one".