155061500 has 96 divisors (see below), whose sum is σ = 374092992. Its totient is φ = 56144000.

The previous prime is 155061497. The next prime is 155061503. The reversal of 155061500 is 5160551.

It is an interprime number because it is at equal distance from previous prime (155061497) and next prime (155061503).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155061503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 665384 + ... + 665616.

It is an arithmetic number, because the mean of its divisors is an integer number (3896802).

Almost surely, 2^155061500 is an apocalyptic number.

155061500 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 155061500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187046496).

155061500 is an abundant number, since it is smaller than the sum of its proper divisors (219031492).

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

155061500 is a wasteful number, since it uses less digits than its factorization.

155061500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 155061500 is about 12452.3692524756. The cubic root of 155061500 is about 537.2395709711.

The spelling of 155061500 in words is "one hundred fifty-five million, sixty-one thousand, five hundred".