155550500 has 96 divisors (see below), whose sum is σ = 396614400. Its totient is φ = 53272800.

The previous prime is 155550469. The next prime is 155550503. The reversal of 155550500 is 5055551.

It is a self number, because there is not a number n which added to its sum of digits gives 155550500.

It is not an unprimeable number, because it can be changed into a prime (155550503) 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, 171047 + ... + 171953.

It is an arithmetic number, because the mean of its divisors is an integer number (4131400).

Almost surely, 2^155550500 is an apocalyptic number.

155550500 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 155550500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198307200).

155550500 is an abundant number, since it is smaller than the sum of its proper divisors (241063900).

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

155550500 is an equidigital number, since it uses as much as digits as its factorization.

155550500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947 (or 921 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 26.

The square root of 155550500 is about 12471.9886144913. The cubic root of 155550500 is about 537.8037223416.

The spelling of 155550500 in words is "one hundred fifty-five million, five hundred fifty thousand, five hundred".