155102720 has 80 divisors (see below), whose sum is σ = 380801520. Its totient is φ = 60555264.

The previous prime is 155102707. The next prime is 155102723. The reversal of 155102720 is 27201551.

It is a happy number.

155102720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155102723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109376 + ... + 110784.

It is an arithmetic number, because the mean of its divisors is an integer number (4760019).

Almost surely, 2^155102720 is an apocalyptic number.

155102720 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 155102720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190400760).

155102720 is an abundant number, since it is smaller than the sum of its proper divisors (225698800).

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

155102720 is an equidigital number, since it uses as much as digits as its factorization.

155102720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475 (or 1459 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 155102720 is about 12454.0242492136. The cubic root of 155102720 is about 537.2871715535.

The spelling of 155102720 in words is "one hundred fifty-five million, one hundred two thousand, seven hundred twenty".