155220528 has 40 divisors (see below), whose sum is σ = 414817200. Its totient is φ = 49955584.

The previous prime is 155220521. The next prime is 155220553. The reversal of 155220528 is 825022551.

It is a junction number, because it is equal to n+sod(n) for n = 155220495 and 155220504.

It is not an unprimeable number, because it can be changed into a prime (155220521) 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, 54363 + ... + 57146.

It is an arithmetic number, because the mean of its divisors is an integer number (10370430).

Almost surely, 2^155220528 is an apocalyptic number.

It is an amenable number.

155220528 is an abundant number, since it is smaller than the sum of its proper divisors (259596672).

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

155220528 is a wasteful number, since it uses less digits than its factorization.

155220528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111549 (or 111543 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 155220528 is about 12458.7530676228. The cubic root of 155220528 is about 537.4231689713.

The spelling of 155220528 in words is "one hundred fifty-five million, two hundred twenty thousand, five hundred twenty-eight".