156540381 has 8 divisors (see below), whose sum is σ = 208790400. Its totient is φ = 104325312.

The previous prime is 156540379. The next prime is 156540383. The reversal of 156540381 is 183045651.

It is an interprime number because it is at equal distance from previous prime (156540379) and next prime (156540383).

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

It is not a de Polignac number, because 156540381 - 2¹ = 156540379 is a prime.

It is a super-2 number, since 2×156540381² = 49009781767250322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156540383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4645 + ... + 18293.

It is an arithmetic number, because the mean of its divisors is an integer number (26098800).

Almost surely, 2^156540381 is an apocalyptic number.

It is an amenable number.

156540381 is a deficient number, since it is larger than the sum of its proper divisors (52250019).

156540381 is a wasteful number, since it uses less digits than its factorization.

156540381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17475.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 156540381 is about 12511.6098484568. The cubic root of 156540381 is about 538.9421230406.

The spelling of 156540381 in words is "one hundred fifty-six million, five hundred forty thousand, three hundred eighty-one".