2415423221 has 2 divisors, whose sum is σ = 2415423222. Its totient is φ = 2415423220.

The previous prime is 2415423211. The next prime is 2415423239. The reversal of 2415423221 is 1223245142.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2341204996 + 74218225 = 48386^2 + 8615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2415423221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2415423211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1207711610 + 1207711611.

It is an arithmetic number, because the mean of its divisors is an integer number (1207711611).

Almost surely, 2^2415423221 is an apocalyptic number.

It is an amenable number.

2415423221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2415423221 is an equidigital number, since it uses as much as digits as its factorization.

2415423221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 26.

The square root of 2415423221 is about 49146.9553583943. The cubic root of 2415423221 is about 1341.7277818403.

Adding to 2415423221 its reverse (1223245142), we get a palindrome (3638668363).

The spelling of 2415423221 in words is "two billion, four hundred fifteen million, four hundred twenty-three thousand, two hundred twenty-one".