155067220 has 48 divisors (see below), whose sum is σ = 405998208. Its totient is φ = 48332160.

The previous prime is 155067179. The next prime is 155067223. The reversal of 155067220 is 22760551.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155067223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48807 + ... + 51886.

It is an arithmetic number, because the mean of its divisors is an integer number (8458296).

Almost surely, 2^155067220 is an apocalyptic number.

155067220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155067220 is an abundant number, since it is smaller than the sum of its proper divisors (250930988).

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

155067220 is a wasteful number, since it uses less digits than its factorization.

155067220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100720 (or 100718 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 155067220 is about 12452.5989255255. The cubic root of 155067220 is about 537.2461768932.

The spelling of 155067220 in words is "one hundred fifty-five million, sixty-seven thousand, two hundred twenty".