156117013 has 8 divisors (see below), whose sum is σ = 169792056. Its totient is φ = 142680000.

The previous prime is 156117011. The next prime is 156117019. The reversal of 156117013 is 310711651.

It can be written as a sum of positive squares in 4 ways, for example, as 27112849 + 129004164 = 5207^2 + 11358^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 156117013 - 2¹ = 156117011 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 (156117011) 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 7 ways as a sum of consecutive naturals, for example, 58138 + ... + 60763.

It is an arithmetic number, because the mean of its divisors is an integer number (21224007).

Almost surely, 2^156117013 is an apocalyptic number.

156117013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

156117013 is a deficient number, since it is larger than the sum of its proper divisors (13675043).

156117013 is a wasteful number, since it uses less digits than its factorization.

156117013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119015.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 156117013 is about 12494.6793876434. The cubic root of 156117013 is about 538.4558228389.

Adding to 156117013 its reverse (310711651), we get a palindrome (466828664).

The spelling of 156117013 in words is "one hundred fifty-six million, one hundred seventeen thousand, thirteen".