10203482215521 has 63 divisors (see below), whose sum is σ = 17796947457603. Its totient is φ = 5830216282800.

The previous prime is 10203482215513. The next prime is 10203482215543. The reversal of 10203482215521 is 12551228430201.

The square root of 10203482215521 is 3194289.

It is a perfect power (a square), and thus also a powerful number.

10203482215521 is a `hidden beast` number, since 1 + 0 + 2 + 0 + 3 + 4 + 82 + 21 + 552 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10201067475921 + 2414739600 = 3193911^2 + 49140^2 .

It is a tau number, because it is divible by the number of its divisors (63).

It is not a de Polignac number, because 10203482215521 - 2³ = 10203482215513 is a prime.

It is a super-2 number, since 2×10203482215521² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10203482215561) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 603712171 + ... + 603729071.

Almost surely, 2^{10203482215521} is an apocalyptic number.

10203482215521 is the 3194289-th square number.

10203482215521 is the 1597145-th centered octagonal number.

It is an amenable number.

10203482215521 is a deficient number, since it is larger than the sum of its proper divisors (7593465242082).

10203482215521 is an frugal number, since it uses more digits than its factorization.

10203482215521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33834 (or 16911 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

Multiplying 10203482215521 by its sum of digits (36), we get a square (367325359758756 = 19165734²).

The spelling of 10203482215521 in words is "ten trillion, two hundred three billion, four hundred eighty-two million, two hundred fifteen thousand, five hundred twenty-one".