10720324521 has 9 divisors (see below), whose sum is σ = 15485361879. Its totient is φ = 7146675936.

The previous prime is 10720324519. The next prime is 10720324523. The reversal of 10720324521 is 12542302701.

The square root of 10720324521 is 103539.

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

10720324521 is a `hidden beast` number, since 1 + 0 + 7 + 203 + 2 + 452 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (10720324519) and next prime (10720324523).

It can be written as a sum of positive squares in only one way, i.e., 9485786025 + 1234538496 = 97395^2 + 35136^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 10720324521 - 2¹ = 10720324519 is a prime.

It is a super-2 number, since 2×10720324521² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10720324523) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 293361 + ... + 327873.

Almost surely, 2^10720324521 is an apocalyptic number.

10720324521 is the 103539-th square number.

10720324521 is the 51770-th centered octagonal number.

It is an amenable number.

10720324521 is a deficient number, since it is larger than the sum of its proper divisors (4765037358).

10720324521 is an frugal number, since it uses more digits than its factorization.

10720324521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69032 (or 34516 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

It can be divided in two parts, 10720 and 324521, that added together give a square (335241 = 579²).

The spelling of 10720324521 in words is "ten billion, seven hundred twenty million, three hundred twenty-four thousand, five hundred twenty-one".