21252931100552 has 36 divisors (see below), whose sum is σ = 40716315694455. Its totient is φ = 10400070634576.

The previous prime is 21252931100549. The next prime is 21252931100561. The reversal of 21252931100552 is 25500113925212.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 10626465550276 + 10626465550276 = 3259826^2 + 3259826^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3259826.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 612829949 + ... + 612864627.

Almost surely, 2^{21252931100552} is an apocalyptic number.

It is an amenable number.

21252931100552 is a deficient number, since it is larger than the sum of its proper divisors (19463384593903).

21252931100552 is an frugal number, since it uses more digits than its factorization.

21252931100552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69458 (or 34728 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 21252931100552 in words is "twenty-one trillion, two hundred fifty-two billion, nine hundred thirty-one million, one hundred thousand, five hundred fifty-two".