155475000 has 144 divisors (see below), whose sum is σ = 527075640. Its totient is φ = 41400000.

The previous prime is 155474989. The next prime is 155475007. The reversal of 155475000 is 574551.

155475000 is a `hidden beast` number, since 155 + 4 + 7 + 500 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155475007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 224655 + ... + 225345.

Almost surely, 2^155475000 is an apocalyptic number.

155475000 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 155475000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263537820).

155475000 is an abundant number, since it is smaller than the sum of its proper divisors (371600640).

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

155475000 is an equidigital number, since it uses as much as digits as its factorization.

155475000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 155475000 is about 12468.9614643722. The cubic root of 155475000 is about 537.7166964729.

The spelling of 155475000 in words is "one hundred fifty-five million, four hundred seventy-five thousand".