23403324251 has 4 divisors (see below), whose sum is σ = 24420860112. Its totient is φ = 22385788392.

The previous prime is 23403324239. The next prime is 23403324253. The reversal of 23403324251 is 15242330432.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 23403324251 - 2⁶ = 23403324187 is a prime.

It is a super-2 number, since 2×23403324251² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23403324253) 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, 508767896 + ... + 508767941.

It is an arithmetic number, because the mean of its divisors is an integer number (6105215028).

Almost surely, 2^23403324251 is an apocalyptic number.

23403324251 is a deficient number, since it is larger than the sum of its proper divisors (1017535861).

23403324251 is a wasteful number, since it uses less digits than its factorization.

23403324251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017535860.

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 23403324251 its reverse (15242330432), we get a palindrome (38645654683).

The spelling of 23403324251 in words is "twenty-three billion, four hundred three million, three hundred twenty-four thousand, two hundred fifty-one".