21525512383 has 2 divisors, whose sum is σ = 21525512384. Its totient is φ = 21525512382.

The previous prime is 21525512381. The next prime is 21525512429. The reversal of 21525512383 is 38321552512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21525512383 - 2¹ = 21525512381 is a prime.

Together with 21525512381, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21525512381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10762756191 + 10762756192.

It is an arithmetic number, because the mean of its divisors is an integer number (10762756192).

Almost surely, 2^21525512383 is an apocalyptic number.

21525512383 is a deficient number, since it is larger than the sum of its proper divisors (1).

21525512383 is an equidigital number, since it uses as much as digits as its factorization.

21525512383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72000, while the sum is 37.

The spelling of 21525512383 in words is "twenty-one billion, five hundred twenty-five million, five hundred twelve thousand, three hundred eighty-three".