2387722561 has 4 divisors (see below), whose sum is σ = 2728825792. Its totient is φ = 2046619332.

The previous prime is 2387722537. The next prime is 2387722613. The reversal of 2387722561 is 1652277832.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2387722561 - 2⁷ = 2387722433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2387722501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170551605 + ... + 170551618.

It is an arithmetic number, because the mean of its divisors is an integer number (682206448).

Almost surely, 2^2387722561 is an apocalyptic number.

It is an amenable number.

2387722561 is a deficient number, since it is larger than the sum of its proper divisors (341103231).

2387722561 is an equidigital number, since it uses as much as digits as its factorization.

2387722561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341103230.

The product of its digits is 282240, while the sum is 43.

The square root of 2387722561 is about 48864.3281034335. The cubic root of 2387722561 is about 1336.5789620863.

The spelling of 2387722561 in words is "two billion, three hundred eighty-seven million, seven hundred twenty-two thousand, five hundred sixty-one".