275000261 has 4 divisors (see below), whose sum is σ = 279508524. Its totient is φ = 270492000.

The previous prime is 275000251. The next prime is 275000263. The reversal of 275000261 is 162000572.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 120868036 + 154132225 = 10994^2 + 12415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-275000261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275000263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2254040 + ... + 2254161.

It is an arithmetic number, because the mean of its divisors is an integer number (69877131).

Almost surely, 2^275000261 is an apocalyptic number.

It is an amenable number.

275000261 is a deficient number, since it is larger than the sum of its proper divisors (4508263).

275000261 is an equidigital number, since it uses as much as digits as its factorization.

275000261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4508262.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 275000261 is about 16583.1318212212. The cubic root of 275000261 is about 650.2959291555.

The spelling of 275000261 in words is "two hundred seventy-five million, two hundred sixty-one", and thus it is an aban number.