2321563421 has 4 divisors (see below), whose sum is σ = 2375553312. Its totient is φ = 2267573532.

The previous prime is 2321563411. The next prime is 2321563457. The reversal of 2321563421 is 1243651232.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2321563421 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 (2321563411) 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, 26994881 + ... + 26994966.

It is an arithmetic number, because the mean of its divisors is an integer number (593888328).

Almost surely, 2^2321563421 is an apocalyptic number.

It is an amenable number.

2321563421 is a deficient number, since it is larger than the sum of its proper divisors (53989891).

2321563421 is an equidigital number, since it uses as much as digits as its factorization.

2321563421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53989890.

The product of its digits is 8640, while the sum is 29.

The square root of 2321563421 is about 48182.6049627871. The cubic root of 2321563421 is about 1324.1184920634.

The spelling of 2321563421 in words is "two billion, three hundred twenty-one million, five hundred sixty-three thousand, four hundred twenty-one".