23151233215133 has 4 divisors (see below), whose sum is σ = 24513070463100. Its totient is φ = 21789395967168.

The previous prime is 23151233215073. The next prime is 23151233215147. The reversal of 23151233215133 is 33151233215132.

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 17130476654404 + 6020756560729 = 4138898^2 + 2453723^2 .

It is a cyclic number.

It is not a de Polignac number, because 23151233215133 - 2¹² = 23151233211037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23151233215093 and 23151233215102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23151233215333) 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, 680918623958 + ... + 680918623991.

It is an arithmetic number, because the mean of its divisors is an integer number (6128267615775).

Almost surely, 2^{23151233215133} is an apocalyptic number.

It is an amenable number.

23151233215133 is a deficient number, since it is larger than the sum of its proper divisors (1361837247967).

23151233215133 is a wasteful number, since it uses less digits than its factorization.

23151233215133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361837247966.

The product of its digits is 48600, while the sum is 35.

Subtracting 23151233215133 from its reverse (33151233215132), we obtain a palindrome (9999999999999).

The spelling of 23151233215133 in words is "twenty-three trillion, one hundred fifty-one billion, two hundred thirty-three million, two hundred fifteen thousand, one hundred thirty-three".