155315520 has 168 divisors, whose sum is σ = 538886400. Its totient is φ = 41057280.

The previous prime is 155315513. The next prime is 155315521. The reversal of 155315520 is 25513551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155315521) 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 23 ways as a sum of consecutive naturals, for example, 572985 + ... + 573255.

Almost surely, 2^155315520 is an apocalyptic number.

155315520 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 155315520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269443200).

155315520 is an abundant number, since it is smaller than the sum of its proper divisors (383570880).

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

155315520 is a wasteful number, since it uses less digits than its factorization.

155315520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 155315520 is about 12462.5647440645. The cubic root of 155315520 is about 537.5327775216.

The spelling of 155315520 in words is "one hundred fifty-five million, three hundred fifteen thousand, five hundred twenty".