155385216 has 160 divisors (see below), whose sum is σ = 528731280. Its totient is φ = 44375040.

The previous prime is 155385199. The next prime is 155385221. The reversal of 155385216 is 612583551.

It is a happy number.

155385216 is a `hidden beast` number, since 1 + 553 + 85 + 21 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 71506 + ... + 73646.

Almost surely, 2^155385216 is an apocalyptic number.

155385216 is a gapful number since it is divisible by the number (16) 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 155385216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264365640).

155385216 is an abundant number, since it is smaller than the sum of its proper divisors (373346064).

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

155385216 is an equidigital number, since it uses as much as digits as its factorization.

155385216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2174 (or 2153 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

The square root of 155385216 is about 12465.3606446023. The cubic root of 155385216 is about 537.6131693203.

The spelling of 155385216 in words is "one hundred fifty-five million, three hundred eighty-five thousand, two hundred sixteen".