155919228 has 48 divisors (see below), whose sum is σ = 374250240. Its totient is φ = 50492800.

The previous prime is 155919217. The next prime is 155919229. The reversal of 155919228 is 822919551.

155919228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 155919228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155919229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152503 + ... + 153521.

It is an arithmetic number, because the mean of its divisors is an integer number (7796880).

Almost surely, 2^155919228 is an apocalyptic number.

It is an amenable number.

155919228 is an abundant number, since it is smaller than the sum of its proper divisors (218331012).

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

155919228 is a wasteful number, since it uses less digits than its factorization.

155919228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378 (or 1376 counting only the distinct ones).

The product of its digits is 64800, while the sum is 42.

The square root of 155919228 is about 12486.7621103311. The cubic root of 155919228 is about 538.2283364406.

The spelling of 155919228 in words is "one hundred fifty-five million, nine hundred nineteen thousand, two hundred twenty-eight".