155075550 has 96 divisors (see below), whose sum is σ = 443757312. Its totient is φ = 35105280.

The previous prime is 155075527. The next prime is 155075561. The reversal of 155075550 is 55570551.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 117997 + ... + 119303.

It is an arithmetic number, because the mean of its divisors is an integer number (4622472).

Almost surely, 2^155075550 is an apocalyptic number.

155075550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155075550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221878656).

155075550 is an abundant number, since it is smaller than the sum of its proper divisors (288681762).

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

155075550 is a wasteful number, since it uses less digits than its factorization.

155075550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442 (or 1437 counting only the distinct ones).

The product of its (nonzero) digits is 21875, while the sum is 33.

The square root of 155075550 is about 12452.9333893665. The cubic root of 155075550 is about 537.2557967654.

The spelling of 155075550 in words is "one hundred fifty-five million, seventy-five thousand, five hundred fifty".