157381 has 4 divisors (see below), whose sum is σ = 179872. Its totient is φ = 134892.

The previous prime is 157363. The next prime is 157393. The reversal of 157381 is 183751.

157381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 183751 = 53 ⋅3467.

It is a cyclic number.

It is not a de Polignac number, because 157381 - 2⁵ = 157349 is a prime.

It is a super-2 number, since 2×157381² = 49537558322, which contains 22 as substring.

157381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11235 + ... + 11248.

It is an arithmetic number, because the mean of its divisors is an integer number (44968).

2¹⁵⁷³⁸¹ is an apocalyptic number.

It is an amenable number.

157381 is a deficient number, since it is larger than the sum of its proper divisors (22491).

157381 is an equidigital number, since it uses as much as digits as its factorization.

157381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22490.

The product of its digits is 840, while the sum is 25.

The square root of 157381 is about 396.7127424220. The cubic root of 157381 is about 53.9905104495.

It can be divided in two parts, 15 and 7381, that added together give a square (7396 = 86²).

The spelling of 157381 in words is "one hundred fifty-seven thousand, three hundred eighty-one".