155057855 has 8 divisors (see below), whose sum is σ = 187110000. Its totient is φ = 123352576.

The previous prime is 155057849. The next prime is 155057869. The reversal of 155057855 is 558750551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155057855 - 2⁸ = 155057599 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85730 + ... + 87519.

It is an arithmetic number, because the mean of its divisors is an integer number (23388750).

Almost surely, 2^155057855 is an apocalyptic number.

155057855 is a deficient number, since it is larger than the sum of its proper divisors (32052145).

155057855 is a wasteful number, since it uses less digits than its factorization.

155057855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173433.

The product of its (nonzero) digits is 175000, while the sum is 41.

The square root of 155057855 is about 12452.2228939254. Note that the first 3 decimals coincide. The cubic root of 155057855 is about 537.2353613434.

The spelling of 155057855 in words is "one hundred fifty-five million, fifty-seven thousand, eight hundred fifty-five".