156423117 has 16 divisors (see below), whose sum is σ = 215759360. Its totient is φ = 100699200.

The previous prime is 156423109. The next prime is 156423119. The reversal of 156423117 is 711324651.

It is not a de Polignac number, because 156423117 - 2³ = 156423109 is a prime.

It is a super-4 number, since 4×156423117⁴ (a number of 34 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156423119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48759 + ... + 51867.

It is an arithmetic number, because the mean of its divisors is an integer number (13484960).

Almost surely, 2^156423117 is an apocalyptic number.

It is an amenable number.

156423117 is a deficient number, since it is larger than the sum of its proper divisors (59336243).

156423117 is a wasteful number, since it uses less digits than its factorization.

156423117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3684.

The product of its digits is 5040, while the sum is 30.

The square root of 156423117 is about 12506.9227630141. The cubic root of 156423117 is about 538.8075160340.

Adding to 156423117 its reverse (711324651), we get a palindrome (867747768).

The spelling of 156423117 in words is "one hundred fifty-six million, four hundred twenty-three thousand, one hundred seventeen".