123216435527 has 4 divisors (see below), whose sum is σ = 123217145016. Its totient is φ = 123215726040.

The previous prime is 123216435481. The next prime is 123216435539. The reversal of 123216435527 is 725534612321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 123216435527 - 2¹² = 123216431431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123216435547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100493 + ... + 506489.

It is an arithmetic number, because the mean of its divisors is an integer number (30804286254).

Almost surely, 2^123216435527 is an apocalyptic number.

123216435527 is a deficient number, since it is larger than the sum of its proper divisors (709489).

123216435527 is an equidigital number, since it uses as much as digits as its factorization.

123216435527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709488.

The product of its digits is 302400, while the sum is 41.

The spelling of 123216435527 in words is "one hundred twenty-three billion, two hundred sixteen million, four hundred thirty-five thousand, five hundred twenty-seven".