2405400332221 has 2 divisors, whose sum is σ = 2405400332222. Its totient is φ = 2405400332220.

The previous prime is 2405400332201. The next prime is 2405400332227. The reversal of 2405400332221 is 1222330045042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2039581003321 + 365819328900 = 1428139^2 + 604830^2 .

It is a cyclic number.

It is not a de Polignac number, because 2405400332221 - 2⁹ = 2405400331709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2405400332221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2405400332227) 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, 1202700166110 + 1202700166111.

It is an arithmetic number, because the mean of its divisors is an integer number (1202700166111).

Almost surely, 2^{2405400332221} is an apocalyptic number.

It is an amenable number.

2405400332221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2405400332221 is an equidigital number, since it uses as much as digits as its factorization.

2405400332221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 2405400332221 its reverse (1222330045042), we get a palindrome (3627730377263).

The spelling of 2405400332221 in words is "two trillion, four hundred five billion, four hundred million, three hundred thirty-two thousand, two hundred twenty-one".