155133555 has 16 divisors (see below), whose sum is σ = 250774944. Its totient is φ = 81884160.

The previous prime is 155133527. The next prime is 155133577. The reversal of 155133555 is 555331551.

It is not a de Polignac number, because 155133555 - 2⁵ = 155133523 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51856 + ... + 54765.

It is an arithmetic number, because the mean of its divisors is an integer number (15673434).

Almost surely, 2^155133555 is an apocalyptic number.

155133555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155133555 is a deficient number, since it is larger than the sum of its proper divisors (95641389).

155133555 is a wasteful number, since it uses less digits than its factorization.

155133555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106726.

The product of its digits is 28125, while the sum is 33.

The square root of 155133555 is about 12455.2621409587. The cubic root of 155133555 is about 537.3227740931.

The spelling of 155133555 in words is "one hundred fifty-five million, one hundred thirty-three thousand, five hundred fifty-five".