215147025 has 36 divisors (see below), whose sum is σ = 386202960. Its totient is φ = 114492000.

The previous prime is 215147003. The next prime is 215147041. The reversal of 215147025 is 520741512.

It is not a de Polignac number, because 215147025 - 2⁵ = 215146993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215147025.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 147550 + ... + 149000.

It is an arithmetic number, because the mean of its divisors is an integer number (10727860).

Almost surely, 2^215147025 is an apocalyptic number.

215147025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215147025 is a deficient number, since it is larger than the sum of its proper divisors (171055935).

215147025 is a wasteful number, since it uses less digits than its factorization.

215147025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126 (or 2118 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 215147025 is about 14667.8909526898. The cubic root of 215147025 is about 599.2091664284.

Adding to 215147025 its reverse (520741512), we get a palindrome (735888537).

The spelling of 215147025 in words is "two hundred fifteen million, one hundred forty-seven thousand, twenty-five".