155727550 has 48 divisors (see below), whose sum is σ = 321408000. Its totient is φ = 55656800.

The previous prime is 155727547. The next prime is 155727613. The reversal of 155727550 is 55727551.

It is a happy number.

155727550 is digitally balanced in base 2, 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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30051 + ... + 34849.

It is an arithmetic number, because the mean of its divisors is an integer number (6696000).

Almost surely, 2^155727550 is an apocalyptic number.

155727550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155727550 is an abundant number, since it is smaller than the sum of its proper divisors (165680450).

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

155727550 is a wasteful number, since it uses less digits than its factorization.

155727550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4881 (or 4876 counting only the distinct ones).

The product of its (nonzero) digits is 61250, while the sum is 37.

The square root of 155727550 is about 12479.0845016772. The cubic root of 155727550 is about 538.0076904969.

Subtracting from 155727550 its reverse (55727551), we obtain a palindrome (99999999).

The spelling of 155727550 in words is "one hundred fifty-five million, seven hundred twenty-seven thousand, five hundred fifty".