682211573521 has 3 divisors (see below), whose sum is σ = 682212399483. Its totient is φ = 682210747560.

The previous prime is 682211573501. The next prime is 682211573557. The reversal of 682211573521 is 125375112286.

The square root of 682211573521 is 825961.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 58932903121 + 623278670400 = 242761^2 + 789480^2 .

It is not a de Polignac number, because 682211573521 - 2⁵ = 682211573489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (682211573501) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 412981 + ... + 1238941.

It is an arithmetic number, because the mean of its divisors is an integer number (227404133161).

Almost surely, 2^682211573521 is an apocalyptic number.

682211573521 is the 825961-st square number.

682211573521 is the 412981-st centered octagonal number.

It is an amenable number.

682211573521 is a deficient number, since it is larger than the sum of its proper divisors (825962).

682211573521 is an frugal number, since it uses more digits than its factorization.

682211573521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651922 (or 825961 counting only the distinct ones).

The product of its digits is 201600, while the sum is 43.

The spelling of 682211573521 in words is "six hundred eighty-two billion, two hundred eleven million, five hundred seventy-three thousand, five hundred twenty-one".