2087415254521 has 3 divisors (see below), whose sum is σ = 2087416699311. Its totient is φ = 2087413809732.

The previous prime is 2087415254513. The next prime is 2087415254539. The reversal of 2087415254521 is 1254525147802.

The square root of 2087415254521 is 1444789.

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., 1353823004521 + 733592250000 = 1163539^2 + 856500^2 .

It is not a de Polignac number, because 2087415254521 - 2³ = 2087415254513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2087485254521) 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, 722395 + ... + 2167183.

It is an arithmetic number, because the mean of its divisors is an integer number (695805566437).

Almost surely, 2^{2087415254521} is an apocalyptic number.

2087415254521 is the 1444789-th square number.

2087415254521 is the 722395-th centered octagonal number.

It is an amenable number.

2087415254521 is a deficient number, since it is larger than the sum of its proper divisors (1444790).

2087415254521 is an frugal number, since it uses more digits than its factorization.

2087415254521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2889578 (or 1444789 counting only the distinct ones).

The product of its (nonzero) digits is 896000, while the sum is 46.

The spelling of 2087415254521 in words is "two trillion, eighty-seven billion, four hundred fifteen million, two hundred fifty-four thousand, five hundred twenty-one".