21313422525 has 48 divisors (see below), whose sum is σ = 36247680000. Its totient is φ = 11045012160.

The previous prime is 21313422523. The next prime is 21313422547. The reversal of 21313422525 is 52522431312.

It is not a de Polignac number, because 21313422525 - 2¹ = 21313422523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21313422492 and 21313422501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313422521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 468226 + ... + 511724.

It is an arithmetic number, because the mean of its divisors is an integer number (755160000).

Almost surely, 2^21313422525 is an apocalyptic number.

21313422525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21313422525 is a deficient number, since it is larger than the sum of its proper divisors (14934257475).

21313422525 is a wasteful number, since it uses less digits than its factorization.

21313422525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43698 (or 43693 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

Adding to 21313422525 its reverse (52522431312), we get a palindrome (73835853837).

The spelling of 21313422525 in words is "twenty-one billion, three hundred thirteen million, four hundred twenty-two thousand, five hundred twenty-five".