155218855 has 16 divisors (see below), whose sum is σ = 203437728. Its totient is φ = 112752000.

The previous prime is 155218853. The next prime is 155218859. The reversal of 155218855 is 558812551.

It is not a de Polignac number, because 155218855 - 2¹ = 155218853 is a prime.

It is a super-2 number, since 2×155218855² = 48185785895022050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155218853) 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, 88285 + ... + 90025.

It is an arithmetic number, because the mean of its divisors is an integer number (12714858).

Almost surely, 2^155218855 is an apocalyptic number.

155218855 is a deficient number, since it is larger than the sum of its proper divisors (48218873).

155218855 is a wasteful number, since it uses less digits than its factorization.

155218855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3378.

The product of its digits is 80000, while the sum is 40.

The square root of 155218855 is about 12458.6859258912. The cubic root of 155218855 is about 537.4212381438.

The spelling of 155218855 in words is "one hundred fifty-five million, two hundred eighteen thousand, eight hundred fifty-five".