23451324312551 has 4 divisors (see below), whose sum is σ = 23455582775352. Its totient is φ = 23447065849752.

The previous prime is 23451324312547. The next prime is 23451324312557. The reversal of 23451324312551 is 15521342315432.

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 23451324312551 - 2² = 23451324312547 is a prime.

It is a super-2 number, since 2×23451324312551² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23451324312499 and 23451324312508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23451324312557) 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, 2129223140 + ... + 2129234153.

It is an arithmetic number, because the mean of its divisors is an integer number (5863895693838).

Almost surely, 2^{23451324312551} is an apocalyptic number.

23451324312551 is a deficient number, since it is larger than the sum of its proper divisors (4258462801).

23451324312551 is an equidigital number, since it uses as much as digits as its factorization.

23451324312551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4258462800.

The product of its digits is 432000, while the sum is 41.

Adding to 23451324312551 its reverse (15521342315432), we get a palindrome (38972666627983).

The spelling of 23451324312551 in words is "twenty-three trillion, four hundred fifty-one billion, three hundred twenty-four million, three hundred twelve thousand, five hundred fifty-one".