280225215 has 24 divisors (see below), whose sum is σ = 506844000. Its totient is φ = 142954944.

The previous prime is 280225193. The next prime is 280225219. The reversal of 280225215 is 512522082.

It is not a de Polignac number, because 280225215 - 2¹³ = 280217023 is a prime.

It is a super-2 number, since 2×280225215² = 157052342243592450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280225219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134340 + ... + 136409.

It is an arithmetic number, because the mean of its divisors is an integer number (21118500).

Almost surely, 2^280225215 is an apocalyptic number.

280225215 is a deficient number, since it is larger than the sum of its proper divisors (226618785).

280225215 is a wasteful number, since it uses less digits than its factorization.

280225215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270783 (or 270780 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 280225215 is about 16739.9287632893. The cubic root of 280225215 is about 654.3886181735.

Adding to 280225215 its reverse (512522082), we get a palindrome (792747297).

The spelling of 280225215 in words is "two hundred eighty million, two hundred twenty-five thousand, two hundred fifteen".