215349125 has 8 divisors (see below), whose sum is σ = 268755864. Its totient is φ = 172279200.

The previous prime is 215349119. The next prime is 215349143. The reversal of 215349125 is 521943512.

It can be written as a sum of positive squares in 4 ways, for example, as 39150049 + 176199076 = 6257^2 + 13274^2 .

It is not a de Polignac number, because 215349125 - 2⁴ = 215349109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215349091 and 215349100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 861272 + ... + 861521.

It is an arithmetic number, because the mean of its divisors is an integer number (33594483).

Almost surely, 2^215349125 is an apocalyptic number.

215349125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215349125 is a deficient number, since it is larger than the sum of its proper divisors (53406739).

215349125 is an equidigital number, since it uses as much as digits as its factorization.

215349125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722808 (or 1722798 counting only the distinct ones).

The product of its digits is 10800, while the sum is 32.

The square root of 215349125 is about 14674.7785332522. The cubic root of 215349125 is about 599.3967316117.

The spelling of 215349125 in words is "two hundred fifteen million, three hundred forty-nine thousand, one hundred twenty-five".