2315421421 has 2 divisors, whose sum is σ = 2315421422. Its totient is φ = 2315421420.

The previous prime is 2315421401. The next prime is 2315421439. The reversal of 2315421421 is 1241245132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1397937321 + 917484100 = 37389^2 + 30290^2 .

It is a cyclic number.

It is not a de Polignac number, because 2315421421 - 2¹¹ = 2315419373 is a prime.

It is a super-2 number, since 2×2315421421² = 10722352713651318482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2315421401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1157710710 + 1157710711.

It is an arithmetic number, because the mean of its divisors is an integer number (1157710711).

Almost surely, 2^2315421421 is an apocalyptic number.

It is an amenable number.

2315421421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2315421421 is an equidigital number, since it uses as much as digits as its factorization.

2315421421 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 2315421421 is about 48118.8260559212. The cubic root of 2315421421 is about 1322.9497511570.

Adding to 2315421421 its reverse (1241245132), we get a palindrome (3556666553).

The spelling of 2315421421 in words is "two billion, three hundred fifteen million, four hundred twenty-one thousand, four hundred twenty-one".