21532204315 has 16 divisors (see below), whose sum is σ = 26542676160. Its totient is φ = 16758753280.

The previous prime is 21532204303. The next prime is 21532204321. The reversal of 21532204315 is 51340223512.

It is not a de Polignac number, because 21532204315 - 2¹¹ = 21532202267 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72694 + ... + 219883.

It is an arithmetic number, because the mean of its divisors is an integer number (1658917260).

Almost surely, 2^21532204315 is an apocalyptic number.

21532204315 is a deficient number, since it is larger than the sum of its proper divisors (5010471845).

21532204315 is a wasteful number, since it uses less digits than its factorization.

21532204315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292982.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 21532204315 its reverse (51340223512), we get a palindrome (72872427827).

The spelling of 21532204315 in words is "twenty-one billion, five hundred thirty-two million, two hundred four thousand, three hundred fifteen".