155813280 has 192 divisors, whose sum is σ = 568995840. Its totient is φ = 35103744.

The previous prime is 155813239. The next prime is 155813299. The reversal of 155813280 is 82318551.

It is a happy number.

155813280 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 265147 + ... + 265733.

It is an arithmetic number, because the mean of its divisors is an integer number (2963520).

Almost surely, 2^155813280 is an apocalyptic number.

155813280 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 155813280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284497920).

155813280 is an abundant number, since it is smaller than the sum of its proper divisors (413182560).

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

155813280 is a wasteful number, since it uses less digits than its factorization.

155813280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 683 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 155813280 is about 12482.5189765528. The cubic root of 155813280 is about 538.1063990813.

The spelling of 155813280 in words is "one hundred fifty-five million, eight hundred thirteen thousand, two hundred eighty".