155473815 has 48 divisors (see below), whose sum is σ = 297244512. Its totient is φ = 69140736.

The previous prime is 155473807. The next prime is 155473819. The reversal of 155473815 is 518374551.

155473815 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 155473815 - 2³ = 155473807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155473819) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24337 + ... + 30053.

It is an arithmetic number, because the mean of its divisors is an integer number (6192594).

Almost surely, 2^155473815 is an apocalyptic number.

155473815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155473815 is a deficient number, since it is larger than the sum of its proper divisors (141770697).

155473815 is a wasteful number, since it uses less digits than its factorization.

155473815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5776 (or 5769 counting only the distinct ones).

The product of its digits is 84000, while the sum is 39.

The square root of 155473815 is about 12468.9139462906. The cubic root of 155473815 is about 537.7153303456.

The spelling of 155473815 in words is "one hundred fifty-five million, four hundred seventy-three thousand, eight hundred fifteen".