275205220 has 12 divisors (see below), whose sum is σ = 577931004. Its totient is φ = 110082080.

The previous prime is 275205211. The next prime is 275205277. The reversal of 275205220 is 22502572.

It can be written as a sum of positive squares in 2 ways, for example, as 35141184 + 240064036 = 5928^2 + 15494^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6880111 + ... + 6880150.

It is an arithmetic number, because the mean of its divisors is an integer number (48160917).

Almost surely, 2^275205220 is an apocalyptic number.

275205220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

275205220 is an abundant number, since it is smaller than the sum of its proper divisors (302725784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

275205220 is a wasteful number, since it uses less digits than its factorization.

275205220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13760270 (or 13760268 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 275205220 is about 16589.3104136368. The cubic root of 275205220 is about 650.4574452503.

Adding to 275205220 its reverse (22502572), we get a palindrome (297707792).

The spelling of 275205220 in words is "two hundred seventy-five million, two hundred five thousand, two hundred twenty".