155204415 has 24 divisors (see below), whose sum is σ = 275280720. Its totient is φ = 80849664.

The previous prime is 155204347. The next prime is 155204419. The reversal of 155204415 is 514402551.

155204415 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155204415 - 2⁹ = 155203903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155204419) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38170 + ... + 42039.

It is an arithmetic number, because the mean of its divisors is an integer number (11470030).

Almost surely, 2^155204415 is an apocalyptic number.

155204415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155204415 is a deficient number, since it is larger than the sum of its proper divisors (120076305).

155204415 is a wasteful number, since it uses less digits than its factorization.

155204415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80263 (or 80260 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 155204415 is about 12458.1063970412. The cubic root of 155204415 is about 537.4045722060.

Adding to 155204415 its reverse (514402551), we get a palindrome (669606966).

The spelling of 155204415 in words is "one hundred fifty-five million, two hundred four thousand, four hundred fifteen".