215247025 has 24 divisors (see below), whose sum is σ = 305587584. Its totient is φ = 147331200.

The previous prime is 215247023. The next prime is 215247037. The reversal of 215247025 is 520742512.

It is not a de Polignac number, because 215247025 - 2¹ = 215247023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215246984 and 215247002.

It is not an unprimeable number, because it can be changed into a prime (215247023) 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 23 ways as a sum of consecutive naturals, for example, 179829 + ... + 181021.

It is an arithmetic number, because the mean of its divisors is an integer number (12732816).

Almost surely, 2^215247025 is an apocalyptic number.

215247025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215247025 is a deficient number, since it is larger than the sum of its proper divisors (90340559).

215247025 is a wasteful number, since it uses less digits than its factorization.

215247025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241 (or 2236 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 215247025 is about 14671.2993630421. The cubic root of 215247025 is about 599.3019892090.

Adding to 215247025 its reverse (520742512), we get a palindrome (735989537).

The spelling of 215247025 in words is "two hundred fifteen million, two hundred forty-seven thousand, twenty-five".