156320381 has 8 divisors (see below), whose sum is σ = 180913920. Its totient is φ = 132292368.

The previous prime is 156320371. The next prime is 156320387. The reversal of 156320381 is 183023651.

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 156320381 - 2⁶ = 156320317 is a prime.

It is a super-3 number, since 3×156320381³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156320387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140786 + ... + 141891.

It is an arithmetic number, because the mean of its divisors is an integer number (22614240).

Almost surely, 2^156320381 is an apocalyptic number.

It is an amenable number.

156320381 is a deficient number, since it is larger than the sum of its proper divisors (24593539).

156320381 is an equidigital number, since it uses as much as digits as its factorization.

156320381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282763.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 156320381 is about 12502.8149230483. The cubic root of 156320381 is about 538.6895303782.

The spelling of 156320381 in words is "one hundred fifty-six million, three hundred twenty thousand, three hundred eighty-one".