155828311 has 4 divisors (see below), whose sum is σ = 155879800. Its totient is φ = 155776824.

The previous prime is 155828293. The next prime is 155828327. The reversal of 155828311 is 113828551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113828551 = 191 ⋅595961.

It is a cyclic number.

It is not a de Polignac number, because 155828311 - 2⁵ = 155828279 is a prime.

It is a super-2 number, since 2×155828311² = 48564925018225442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155828371) 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, 20901 + ... + 27358.

It is an arithmetic number, because the mean of its divisors is an integer number (38969950).

Almost surely, 2^155828311 is an apocalyptic number.

155828311 is a deficient number, since it is larger than the sum of its proper divisors (51489).

155828311 is an equidigital number, since it uses as much as digits as its factorization.

155828311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51488.

The product of its digits is 9600, while the sum is 34.

The square root of 155828311 is about 12483.1210440338. The cubic root of 155828311 is about 538.1237018795.

The spelling of 155828311 in words is "one hundred fifty-five million, eight hundred twenty-eight thousand, three hundred eleven".