155055133 has 4 divisors (see below), whose sum is σ = 155083968. Its totient is φ = 155026300.

The previous prime is 155055101. The next prime is 155055163. The reversal of 155055133 is 331550551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155055133 - 2⁵ = 155055101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155055163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3691 + ... + 17992.

It is an arithmetic number, because the mean of its divisors is an integer number (38770992).

Almost surely, 2^155055133 is an apocalyptic number.

It is an amenable number.

155055133 is a deficient number, since it is larger than the sum of its proper divisors (28835).

155055133 is an equidigital number, since it uses as much as digits as its factorization.

155055133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28834.

The product of its (nonzero) digits is 5625, while the sum is 28.

The square root of 155055133 is about 12452.1135956913. The cubic root of 155055133 is about 537.2322176497.

The spelling of 155055133 in words is "one hundred fifty-five million, fifty-five thousand, one hundred thirty-three".