155154720 has 192 divisors, whose sum is σ = 568463616. Its totient is φ = 34836480.

The previous prime is 155154709. The next prime is 155154739. The reversal of 155154720 is 27451551.

155154720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 204582 + ... + 205338.

It is an arithmetic number, because the mean of its divisors is an integer number (2960748).

Almost surely, 2^155154720 is an apocalyptic number.

155154720 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 155154720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284231808).

155154720 is an abundant number, since it is smaller than the sum of its proper divisors (413308896).

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

155154720 is a wasteful number, since it uses less digits than its factorization.

155154720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843 (or 835 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 30.

The square root of 155154720 is about 12456.1117528706. Note that the first 3 decimals coincide. The cubic root of 155154720 is about 537.3472087797.

The spelling of 155154720 in words is "one hundred fifty-five million, one hundred fifty-four thousand, seven hundred twenty".