2801431621 has 2 divisors, whose sum is σ = 2801431622. Its totient is φ = 2801431620.

The previous prime is 2801431613. The next prime is 2801431631. The reversal of 2801431621 is 1261341082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2776130721 + 25300900 = 52689^2 + 5030^2 .

It is a cyclic number.

It is not a de Polignac number, because 2801431621 - 2³ = 2801431613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2801431621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2801431631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1400715810 + 1400715811.

It is an arithmetic number, because the mean of its divisors is an integer number (1400715811).

Almost surely, 2^2801431621 is an apocalyptic number.

It is an amenable number.

2801431621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2801431621 is an equidigital number, since it uses as much as digits as its factorization.

2801431621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 2801431621 is about 52928.5520395183. The cubic root of 2801431621 is about 1409.6999212191.

The spelling of 2801431621 in words is "two billion, eight hundred one million, four hundred thirty-one thousand, six hundred twenty-one".