215042600 has 48 divisors (see below), whose sum is σ = 500963100. Its totient is φ = 85847040.

The previous prime is 215042563. The next prime is 215042603. The reversal of 215042600 is 6240512.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 161137636 + 53904964 = 12694^2 + 7342^2 .

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

It is not an unprimeable number, because it can be changed into a prime (215042603) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 165152 + ... + 166448.

Almost surely, 2^215042600 is an apocalyptic number.

215042600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215042600 is an abundant number, since it is smaller than the sum of its proper divisors (285920500).

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

215042600 is a wasteful number, since it uses less digits than its factorization.

215042600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142 (or 2133 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 215042600 is about 14664.3308746086. The cubic root of 215042600 is about 599.1122055347.

The spelling of 215042600 in words is "two hundred fifteen million, forty-two thousand, six hundred".