21522512304 has 60 divisors (see below), whose sum is σ = 60359083200. Its totient is φ = 7159170432.

The previous prime is 21522512303. The next prime is 21522512317. The reversal of 21522512304 is 40321522512.

It is not an unprimeable number, because it can be changed into a prime (21522512303) 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 11 ways as a sum of consecutive naturals, for example, 87039 + ... + 224990.

It is an arithmetic number, because the mean of its divisors is an integer number (1005984720).

Almost surely, 2^21522512304 is an apocalyptic number.

21522512304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21522512304 is an abundant number, since it is smaller than the sum of its proper divisors (38836570896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21522512304 is a wasteful number, since it uses less digits than its factorization.

21522512304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312522 (or 312513 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

It can be divided in two parts, 215225 and 12304, that added together give a square (227529 = 477²).

The spelling of 21522512304 in words is "twenty-one billion, five hundred twenty-two million, five hundred twelve thousand, three hundred four".