155144520 has 48 divisors (see below), whose sum is σ = 504220860. Its totient is φ = 41371776.

The previous prime is 155144467. The next prime is 155144537. The reversal of 155144520 is 25441551.

It can be written as a sum of positive squares in 2 ways, for example, as 140991876 + 14152644 = 11874^2 + 3762^2 .

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 11 ways as a sum of consecutive naturals, for example, 215119 + ... + 215838.

Almost surely, 2^155144520 is an apocalyptic number.

155144520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155144520 is an abundant number, since it is smaller than the sum of its proper divisors (349076340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155144520 is a wasteful number, since it uses less digits than its factorization.

155144520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430974 (or 430967 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 155144520 is about 12455.7023085814. The cubic root of 155144520 is about 537.3354333045.

The spelling of 155144520 in words is "one hundred fifty-five million, one hundred forty-four thousand, five hundred twenty".