155287144 has 16 divisors (see below), whose sum is σ = 291694500. Its totient is φ = 77501952.

The previous prime is 155287127. The next prime is 155287157. The reversal of 155287144 is 441782551.

It can be written as a sum of positive squares in 2 ways, for example, as 113167044 + 42120100 = 10638^2 + 6490^2 .

It is a super-2 number, since 2×155287144² = 48228194183353472, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 12969 + ... + 21880.

Almost surely, 2^155287144 is an apocalyptic number.

It is an amenable number.

155287144 is a deficient number, since it is larger than the sum of its proper divisors (136407356).

155287144 is a wasteful number, since it uses less digits than its factorization.

155287144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35412 (or 35408 counting only the distinct ones).

The product of its digits is 44800, while the sum is 37.

The square root of 155287144 is about 12461.4262426096. The cubic root of 155287144 is about 537.5000399495.

It can be divided in two parts, 155287 and 144, that multiplied together give a triangular number (22361328 = T₆₆₈₇).

The spelling of 155287144 in words is "one hundred fifty-five million, two hundred eighty-seven thousand, one hundred forty-four".