155556216 has 48 divisors (see below), whose sum is σ = 422472960. Its totient is φ = 51707520.

The previous prime is 155556179. The next prime is 155556217. The reversal of 155556216 is 612655551.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155556217) 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 11 ways as a sum of consecutive naturals, for example, 24756 + ... + 30396.

It is an arithmetic number, because the mean of its divisors is an integer number (8801520).

Almost surely, 2^155556216 is an apocalyptic number.

It is an amenable number.

155556216 is an abundant number, since it is smaller than the sum of its proper divisors (266916744).

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

155556216 is a wasteful number, since it uses less digits than its factorization.

155556216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6036 (or 6029 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

The square root of 155556216 is about 12472.2177658987. The cubic root of 155556216 is about 537.8103098023.

The spelling of 155556216 in words is "one hundred fifty-five million, five hundred fifty-six thousand, two hundred sixteen".