23278233831 has 4 divisors (see below), whose sum is σ = 31037645112. Its totient is φ = 15518822552.

The previous prime is 23278233817. The next prime is 23278233859. The reversal of 23278233831 is 13833287232.

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 23278233831 - 2⁶ = 23278233767 is a prime.

It is a super-2 number, since 2×23278233831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23278231831) 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, 3879705636 + ... + 3879705641.

It is an arithmetic number, because the mean of its divisors is an integer number (7759411278).

Almost surely, 2^23278233831 is an apocalyptic number.

23278233831 is a deficient number, since it is larger than the sum of its proper divisors (7759411281).

23278233831 is an equidigital number, since it uses as much as digits as its factorization.

23278233831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7759411280.

The product of its digits is 290304, while the sum is 42.

The spelling of 23278233831 in words is "twenty-three billion, two hundred seventy-eight million, two hundred thirty-three thousand, eight hundred thirty-one".