123157223 has 4 divisors (see below), whose sum is σ = 140751120. Its totient is φ = 105563328.

The previous prime is 123157219. The next prime is 123157267. The reversal of 123157223 is 322751321.

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 123157223 - 2² = 123157219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123157192 and 123157201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123157273) 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, 8796938 + ... + 8796951.

It is an arithmetic number, because the mean of its divisors is an integer number (35187780).

Almost surely, 2^123157223 is an apocalyptic number.

123157223 is a deficient number, since it is larger than the sum of its proper divisors (17593897).

123157223 is an equidigital number, since it uses as much as digits as its factorization.

123157223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17593896.

The product of its digits is 2520, while the sum is 26.

The square root of 123157223 is about 11097.6224030195. The cubic root of 123157223 is about 497.5307900777.

The spelling of 123157223 in words is "one hundred twenty-three million, one hundred fifty-seven thousand, two hundred twenty-three".