23401452015551 has 4 divisors (see below), whose sum is σ = 23443465394952. Its totient is φ = 23359438636152.

The previous prime is 23401452015527. The next prime is 23401452015553. The reversal of 23401452015551 is 15551025410432.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23401452015551 is a prime.

It is a super-2 number, since 2×23401452015551² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23401452015553) 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, 21006688865 + ... + 21006689978.

It is an arithmetic number, because the mean of its divisors is an integer number (5860866348738).

Almost surely, 2^{23401452015551} is an apocalyptic number.

23401452015551 is a deficient number, since it is larger than the sum of its proper divisors (42013379401).

23401452015551 is an equidigital number, since it uses as much as digits as its factorization.

23401452015551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42013379400.

The product of its (nonzero) digits is 120000, while the sum is 38.

Adding to 23401452015551 its reverse (15551025410432), we get a palindrome (38952477425983).

The spelling of 23401452015551 in words is "twenty-three trillion, four hundred one billion, four hundred fifty-two million, fifteen thousand, five hundred fifty-one".