155415000 has 160 divisors (see below), whose sum is σ = 523519920. Its totient is φ = 38208000.

The previous prime is 155414989. The next prime is 155415017. The reversal of 155415000 is 514551.

155415000 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 194602 + ... + 195398.

Almost surely, 2^155415000 is an apocalyptic number.

155415000 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 155415000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261759960).

155415000 is an abundant number, since it is smaller than the sum of its proper divisors (368104920).

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

155415000 is a wasteful number, since it uses less digits than its factorization.

155415000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 155415000 is about 12466.5552579692. Note that the first 3 decimals coincide. The cubic root of 155415000 is about 537.6475167485.

Adding to 155415000 its reverse (514551), we get a palindrome (155929551).

The spelling of 155415000 in words is "one hundred fifty-five million, four hundred fifteen thousand".