156381223 has 4 divisors (see below), whose sum is σ = 156406248. Its totient is φ = 156356200.

The previous prime is 156381221. The next prime is 156381233. The reversal of 156381223 is 322183651.

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, and also an emirpimes, since its reverse is a distinct semiprime: 322183651 = 31 ⋅10393021.

It is a cyclic number.

It is not a de Polignac number, because 156381223 - 2¹ = 156381221 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 (156381221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5640 + ... + 18562.

It is an arithmetic number, because the mean of its divisors is an integer number (39101562).

Almost surely, 2^156381223 is an apocalyptic number.

156381223 is a deficient number, since it is larger than the sum of its proper divisors (25025).

156381223 is a wasteful number, since it uses less digits than its factorization.

156381223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25024.

The product of its digits is 8640, while the sum is 31.

The square root of 156381223 is about 12505.2478184161. The cubic root of 156381223 is about 538.7594097225.

It can be divided in two parts, 15638 and 1223, that added together give a palindrome (16861).

The spelling of 156381223 in words is "one hundred fifty-six million, three hundred eighty-one thousand, two hundred twenty-three".