2312020561 has 2 divisors, whose sum is σ = 2312020562. Its totient is φ = 2312020560.

The previous prime is 2312020547. The next prime is 2312020577. The reversal of 2312020561 is 1650202132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1472180161 + 839840400 = 38369^2 + 28980^2 .

It is a cyclic number.

It is not a de Polignac number, because 2312020561 - 2²⁵ = 2278466129 is a prime.

It is not a weakly prime, because it can be changed into another prime (2312020261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1156010280 + 1156010281.

It is an arithmetic number, because the mean of its divisors is an integer number (1156010281).

Almost surely, 2^2312020561 is an apocalyptic number.

It is an amenable number.

2312020561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2312020561 is an equidigital number, since it uses as much as digits as its factorization.

2312020561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2312020561 is about 48083.4749264235. The cubic root of 2312020561 is about 1322.3017234846.

Adding to 2312020561 its reverse (1650202132), we get a palindrome (3962222693).

It can be divided in two parts, 23120 and 20561, that added together give a square (43681 = 209²).

The spelling of 2312020561 in words is "two billion, three hundred twelve million, twenty thousand, five hundred sixty-one".