155218636 has 12 divisors (see below), whose sum is σ = 287611128. Its totient is φ = 73044032.

The previous prime is 155218603. The next prime is 155218673. The reversal of 155218636 is 636812551.

It is a junction number, because it is equal to n+sod(n) for n = 155218595 and 155218604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1141246 + ... + 1141381.

It is an arithmetic number, because the mean of its divisors is an integer number (23967594).

Almost surely, 2^155218636 is an apocalyptic number.

It is an amenable number.

155218636 is a deficient number, since it is larger than the sum of its proper divisors (132392492).

155218636 is a wasteful number, since it uses less digits than its factorization.

155218636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2282648 (or 2282646 counting only the distinct ones).

The product of its digits is 43200, while the sum is 37.

The square root of 155218636 is about 12458.6771368392. The cubic root of 155218636 is about 537.4209853925.

It can be divided in two parts, 155 and 218636, that added together give a triangular number (218791 = T₆₆₁).

The spelling of 155218636 in words is "one hundred fifty-five million, two hundred eighteen thousand, six hundred thirty-six".