23243031421 has 4 divisors (see below), whose sum is σ = 23257550844. Its totient is φ = 23228512000.

The previous prime is 23243031403. The next prime is 23243031437. The reversal of 23243031421 is 12413034232.

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 21454925625 + 1788105796 = 146475^2 + 42286^2 .

It is a cyclic number.

It is not a de Polignac number, because 23243031421 - 2¹¹ = 23243029373 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 (23243031491) 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, 7257310 + ... + 7260511.

It is an arithmetic number, because the mean of its divisors is an integer number (5814387711).

Almost surely, 2^23243031421 is an apocalyptic number.

It is an amenable number.

23243031421 is a deficient number, since it is larger than the sum of its proper divisors (14519423).

23243031421 is a wasteful number, since it uses less digits than its factorization.

23243031421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14519422.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 23243031421 its reverse (12413034232), we get a palindrome (35656065653).

The spelling of 23243031421 in words is "twenty-three billion, two hundred forty-three million, thirty-one thousand, four hundred twenty-one".