155441520 has 120 divisors (see below), whose sum is σ = 562214016. Its totient is φ = 38260224.

The previous prime is 155441519. The next prime is 155441543. The reversal of 155441520 is 25144551.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×155441520² = 48324132279820800, which contains 22 as substring.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 1057 + ... + 17663.

Almost surely, 2^155441520 is an apocalyptic number.

155441520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155441520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281107008).

155441520 is an abundant number, since it is smaller than the sum of its proper divisors (406772496).

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

155441520 is a wasteful number, since it uses less digits than its factorization.

155441520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16639 (or 16630 counting only the distinct ones).

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

The square root of 155441520 is about 12467.6188584669. The cubic root of 155441520 is about 537.6780963820.

It can be divided in two parts, 155441 and 520, that added together give a triangular number (155961 = T₅₅₈).

The spelling of 155441520 in words is "one hundred fifty-five million, four hundred forty-one thousand, five hundred twenty".