215225300 has 36 divisors (see below), whose sum is σ = 479669820. Its totient is φ = 83761920.

The previous prime is 215225299. The next prime is 215225303. The reversal of 215225300 is 3522512.

It can be written as a sum of positive squares in 6 ways, for example, as 75076 + 215150224 = 274^2 + 14668^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215225303) 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, 25385 + ... + 32784.

Almost surely, 2^215225300 is an apocalyptic number.

215225300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215225300 is an abundant number, since it is smaller than the sum of its proper divisors (264444520).

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

215225300 is a wasteful number, since it uses less digits than its factorization.

215225300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58220 (or 58213 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 215225300 is about 14670.5589532233. The cubic root of 215225300 is about 599.2818259048.

Adding to 215225300 its reverse (3522512), we get a palindrome (218747812).

The spelling of 215225300 in words is "two hundred fifteen million, two hundred twenty-five thousand, three hundred".