155781230 has 32 divisors (see below), whose sum is σ = 306413280. Its totient is φ = 56552320.

The previous prime is 155781221. The next prime is 155781233. The reversal of 155781230 is 32187551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155781233) 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, 121352 + ... + 122628.

It is an arithmetic number, because the mean of its divisors is an integer number (9575415).

Almost surely, 2^155781230 is an apocalyptic number.

155781230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155781230 is a deficient number, since it is larger than the sum of its proper divisors (150632050).

155781230 is a wasteful number, since it uses less digits than its factorization.

155781230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 155781230 is about 12481.2351151639. The cubic root of 155781230 is about 538.0695013006.

The spelling of 155781230 in words is "one hundred fifty-five million, seven hundred eighty-one thousand, two hundred thirty".