155155233 has 4 divisors (see below), whose sum is σ = 206873648. Its totient is φ = 103436820.

The previous prime is 155155229. The next prime is 155155237. The reversal of 155155233 is 332551551.

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 an interprime number because it is at equal distance from previous prime (155155229) and next prime (155155237).

It is not a de Polignac number, because 155155233 - 2² = 155155229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155155233.

It is not an unprimeable number, because it can be changed into a prime (155155237) 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, 25859203 + ... + 25859208.

It is an arithmetic number, because the mean of its divisors is an integer number (51718412).

Almost surely, 2^155155233 is an apocalyptic number.

It is an amenable number.

155155233 is a deficient number, since it is larger than the sum of its proper divisors (51718415).

155155233 is an equidigital number, since it uses as much as digits as its factorization.

155155233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51718414.

The product of its digits is 11250, while the sum is 30.

The square root of 155155233 is about 12456.1323451543. The cubic root of 155155233 is about 537.3478010032.

The spelling of 155155233 in words is "one hundred fifty-five million, one hundred fifty-five thousand, two hundred thirty-three".