155727381 has 16 divisors (see below), whose sum is σ = 213396480. Its totient is φ = 100959600.

The previous prime is 155727371. The next prime is 155727427. The reversal of 155727381 is 183727551.

It is not a de Polignac number, because 155727381 - 2⁵ = 155727349 is a prime.

It is a super-2 number, since 2×155727381² = 48502034386238322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155727301) 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 15 ways as a sum of consecutive naturals, for example, 28306 + ... + 33356.

It is an arithmetic number, because the mean of its divisors is an integer number (13337280).

Almost surely, 2^155727381 is an apocalyptic number.

It is an amenable number.

155727381 is a deficient number, since it is larger than the sum of its proper divisors (57669099).

155727381 is a wasteful number, since it uses less digits than its factorization.

155727381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5336.

The product of its digits is 58800, while the sum is 39.

The square root of 155727381 is about 12479.0777303453. The cubic root of 155727381 is about 538.0074958764.

The spelling of 155727381 in words is "one hundred fifty-five million, seven hundred twenty-seven thousand, three hundred eighty-one".