155222200 has 144 divisors (see below), whose sum is σ = 430017120. Its totient is φ = 51932160.

The previous prime is 155222173. The next prime is 155222237. The reversal of 155222200 is 2222551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 460432 + ... + 460768.

It is an arithmetic number, because the mean of its divisors is an integer number (2986230).

Almost surely, 2^155222200 is an apocalyptic number.

155222200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155222200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215008560).

155222200 is an abundant number, since it is smaller than the sum of its proper divisors (274794920).

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

155222200 is a wasteful number, since it uses less digits than its factorization.

155222200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 155222200 is about 12458.8201688603. The cubic root of 155222200 is about 537.4250986308.

Adding to 155222200 its reverse (2222551), we get a palindrome (157444751).

The spelling of 155222200 in words is "one hundred fifty-five million, two hundred twenty-two thousand, two hundred".