215341225 has 48 divisors (see below), whose sum is σ = 303730560. Its totient is φ = 150080000.

The previous prime is 215341199. The next prime is 215341237. The reversal of 215341225 is 522143512.

It is not a de Polignac number, because 215341225 - 2¹⁹ = 214816937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 215341225.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 800391 + ... + 800659.

It is an arithmetic number, because the mean of its divisors is an integer number (6327720).

Almost surely, 2^215341225 is an apocalyptic number.

215341225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215341225 is a deficient number, since it is larger than the sum of its proper divisors (88389335).

215341225 is a wasteful number, since it uses less digits than its factorization.

215341225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 397 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 215341225 is about 14674.5093614744. The cubic root of 215341225 is about 599.3894019757.

Adding to 215341225 its reverse (522143512), we get a palindrome (737484737).

The spelling of 215341225 in words is "two hundred fifteen million, three hundred forty-one thousand, two hundred twenty-five".