2813565421 has 2 divisors, whose sum is σ = 2813565422. Its totient is φ = 2813565420.

The previous prime is 2813565409. The next prime is 2813565437. The reversal of 2813565421 is 1245653182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2640932100 + 172633321 = 51390^2 + 13139^2 .

It is a cyclic number.

It is not a de Polignac number, because 2813565421 - 2⁵ = 2813565389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2813565401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1406782710 + 1406782711.

It is an arithmetic number, because the mean of its divisors is an integer number (1406782711).

Almost surely, 2^2813565421 is an apocalyptic number.

It is an amenable number.

2813565421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2813565421 is an equidigital number, since it uses as much as digits as its factorization.

2813565421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 37.

The square root of 2813565421 is about 53043.0525233984. The cubic root of 2813565421 is about 1411.7322607390.

The spelling of 2813565421 in words is "two billion, eight hundred thirteen million, five hundred sixty-five thousand, four hundred twenty-one".