23106566551531 has 4 divisors (see below), whose sum is σ = 23111367422032. Its totient is φ = 23101765681032.

The previous prime is 23106566551501. The next prime is 23106566551543. The reversal of 23106566551531 is 13515566560132.

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 23106566551531 - 2⁷ = 23106566551403 is a prime.

It is a super-2 number, since 2×23106566551531² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23106566551501) 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, 2400428031 + ... + 2400437656.

It is an arithmetic number, because the mean of its divisors is an integer number (5777841855508).

Almost surely, 2^{23106566551531} is an apocalyptic number.

23106566551531 is a deficient number, since it is larger than the sum of its proper divisors (4800870501).

23106566551531 is an equidigital number, since it uses as much as digits as its factorization.

23106566551531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4800870500.

The product of its (nonzero) digits is 2430000, while the sum is 49.

The spelling of 23106566551531 in words is "twenty-three trillion, one hundred six billion, five hundred sixty-six million, five hundred fifty-one thousand, five hundred thirty-one".