2313020821 has 2 divisors, whose sum is σ = 2313020822. Its totient is φ = 2313020820.

The previous prime is 2313020807. The next prime is 2313020881. The reversal of 2313020821 is 1280203132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1380939921 + 932080900 = 37161^2 + 30530^2 .

It is a cyclic number.

It is not a de Polignac number, because 2313020821 - 2¹³ = 2313012629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2313020792 and 2313020801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2313020881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1156510410 + 1156510411.

It is an arithmetic number, because the mean of its divisors is an integer number (1156510411).

Almost surely, 2^2313020821 is an apocalyptic number.

It is an amenable number.

2313020821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2313020821 is an equidigital number, since it uses as much as digits as its factorization.

2313020821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 2313020821 is about 48093.8750882064. The cubic root of 2313020821 is about 1322.4923871332.

Adding to 2313020821 its reverse (1280203132), we get a palindrome (3593223953).

The spelling of 2313020821 in words is "two billion, three hundred thirteen million, twenty thousand, eight hundred twenty-one".