21501512330552 has 32 divisors (see below), whose sum is σ = 40337683177680. Its totient is φ = 10744797423360.

The previous prime is 21501512330549. The next prime is 21501512330587. The reversal of 21501512330552 is 25503321510512.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516929468 + ... + 516971060.

Almost surely, 2^{21501512330552} is an apocalyptic number.

It is an amenable number.

21501512330552 is a deficient number, since it is larger than the sum of its proper divisors (18836170847128).

21501512330552 is a wasteful number, since it uses less digits than its factorization.

21501512330552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75863 (or 75859 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 35.

The spelling of 21501512330552 in words is "twenty-one trillion, five hundred one billion, five hundred twelve million, three hundred thirty thousand, five hundred fifty-two".