155219028 has 24 divisors (see below), whose sum is σ = 363699840. Its totient is φ = 51522240.

The previous prime is 155219021. The next prime is 155219039. The reversal of 155219028 is 820912551.

It is a self number, because there is not a number n which added to its sum of digits gives 155219028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155219021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24193 + ... + 29928.

It is an arithmetic number, because the mean of its divisors is an integer number (15154160).

Almost surely, 2^155219028 is an apocalyptic number.

It is an amenable number.

155219028 is an abundant number, since it is smaller than the sum of its proper divisors (208480812).

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

155219028 is a wasteful number, since it uses less digits than its factorization.

155219028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54367 (or 54365 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 155219028 is about 12458.6928688366. The cubic root of 155219028 is about 537.4214378056.

The spelling of 155219028 in words is "one hundred fifty-five million, two hundred nineteen thousand, twenty-eight".