155312200 has 24 divisors (see below), whose sum is σ = 361101330. Its totient is φ = 62124800.

The previous prime is 155312191. The next prime is 155312203. The reversal of 155312200 is 2213551.

It can be written as a sum of positive squares in 3 ways, for example, as 151142436 + 4169764 = 12294^2 + 2042^2 .

It is not an unprimeable number, because it can be changed into a prime (155312203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 388081 + ... + 388480.

Almost surely, 2^155312200 is an apocalyptic number.

155312200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155312200 is an abundant number, since it is smaller than the sum of its proper divisors (205789130).

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

155312200 is a wasteful number, since it uses less digits than its factorization.

155312200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776577 (or 776568 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 155312200 is about 12462.4315444459. The cubic root of 155312200 is about 537.5289474224.

Adding to 155312200 its reverse (2213551), we get a palindrome (157525751).

The spelling of 155312200 in words is "one hundred fifty-five million, three hundred twelve thousand, two hundred".