2415321421 has 2 divisors, whose sum is σ = 2415321422. Its totient is φ = 2415321420.

The previous prime is 2415321323. The next prime is 2415321479. The reversal of 2415321421 is 1241235142.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1362643396 + 1052678025 = 36914^2 + 32445^2 .

It is a cyclic number.

It is not a de Polignac number, because 2415321421 - 2¹¹ = 2415319373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2415321221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1207660710 + 1207660711.

It is an arithmetic number, because the mean of its divisors is an integer number (1207660711).

Almost surely, 2^2415321421 is an apocalyptic number.

It is an amenable number.

2415321421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2415321421 is an equidigital number, since it uses as much as digits as its factorization.

2415321421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 25.

The square root of 2415321421 is about 49145.9196780363. The cubic root of 2415321421 is about 1341.7089321682.

Adding to 2415321421 its reverse (1241235142), we get a palindrome (3656556563).

The spelling of 2415321421 in words is "two billion, four hundred fifteen million, three hundred twenty-one thousand, four hundred twenty-one".