2312400421 has 4 divisors (see below), whose sum is σ = 2312804844. Its totient is φ = 2311996000.

The previous prime is 2312400397. The next prime is 2312400437. The reversal of 2312400421 is 1240042132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1880176321 + 432224100 = 43361^2 + 20790^2 .

It is a cyclic number.

It is not a de Polignac number, because 2312400421 - 2⁹ = 2312399909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2312400481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193510 + ... + 205111.

It is an arithmetic number, because the mean of its divisors is an integer number (578201211).

Almost surely, 2^2312400421 is an apocalyptic number.

It is an amenable number.

2312400421 is a deficient number, since it is larger than the sum of its proper divisors (404423).

2312400421 is an equidigital number, since it uses as much as digits as its factorization.

2312400421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404422.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2312400421 is about 48087.4247698918. The cubic root of 2312400421 is about 1322.3741366277.

Adding to 2312400421 its reverse (1240042132), we get a palindrome (3552442553).

The spelling of 2312400421 in words is "two billion, three hundred twelve million, four hundred thousand, four hundred twenty-one".