156342223 has 4 divisors (see below), whose sum is σ = 156814888. Its totient is φ = 155869560.

The previous prime is 156342211. The next prime is 156342259. The reversal of 156342223 is 322243651.

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 156342223 - 2²¹ = 154245071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 156342191 and 156342200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156342623) 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, 235836 + ... + 236497.

It is an arithmetic number, because the mean of its divisors is an integer number (39203722).

Almost surely, 2^156342223 is an apocalyptic number.

156342223 is a deficient number, since it is larger than the sum of its proper divisors (472665).

156342223 is an equidigital number, since it uses as much as digits as its factorization.

156342223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472664.

The product of its digits is 8640, while the sum is 28.

The square root of 156342223 is about 12503.6883758353. The cubic root of 156342223 is about 538.7146188295.

Adding to 156342223 its reverse (322243651), we get a palindrome (478585874).

The spelling of 156342223 in words is "one hundred fifty-six million, three hundred forty-two thousand, two hundred twenty-three".