21425524315 has 32 divisors (see below), whose sum is σ = 28364878080. Its totient is φ = 15439780224.

The previous prime is 21425524313. The next prime is 21425524321. The reversal of 21425524315 is 51342552412.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21425524315 - 2¹ = 21425524313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21425524313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 442996 + ... + 488974.

It is an arithmetic number, because the mean of its divisors is an integer number (886402440).

Almost surely, 2^21425524315 is an apocalyptic number.

21425524315 is a deficient number, since it is larger than the sum of its proper divisors (6939353765).

21425524315 is a wasteful number, since it uses less digits than its factorization.

21425524315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46171.

The product of its digits is 48000, while the sum is 34.

The spelling of 21425524315 in words is "twenty-one billion, four hundred twenty-five million, five hundred twenty-four thousand, three hundred fifteen".