2287804561 has 9 divisors (see below), whose sum is σ = 2661713211. Its totient is φ = 1960688352.

The previous prime is 2287804553. The next prime is 2287804583. The reversal of 2287804561 is 1654087822.

It is a happy number.

The square root of 2287804561 is 47831.

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

It can be written as a sum of positive squares in only one way, i.e., 285779025 + 2002025536 = 16905^2 + 44744^2 .

It is not a de Polignac number, because 2287804561 - 2³ = 2287804553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2287804501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 331401 + ... + 338233.

Almost surely, 2^2287804561 is an apocalyptic number.

2287804561 is the 47831-st square number.

2287804561 is the 23916-th centered octagonal number.

It is an amenable number.

2287804561 is a deficient number, since it is larger than the sum of its proper divisors (373908650).

2287804561 is an frugal number, since it uses more digits than its factorization.

2287804561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13680 (or 6840 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The cubic root of 2287804561 is about 1317.6689347184.

The spelling of 2287804561 in words is "two billion, two hundred eighty-seven million, eight hundred four thousand, five hundred sixty-one".