275221513261 has 8 divisors (see below), whose sum is σ = 293896166400. Its totient is φ = 257159143920.

The previous prime is 275221513241. The next prime is 275221513267. The reversal of 275221513261 is 162315122572.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 275221513261 - 2¹⁵ = 275221480493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 275221513261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275221513267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153070021 + ... + 153071818.

It is an arithmetic number, because the mean of its divisors is an integer number (36737020800).

Almost surely, 2^275221513261 is an apocalyptic number.

It is an amenable number.

275221513261 is a deficient number, since it is larger than the sum of its proper divisors (18674653139).

275221513261 is a wasteful number, since it uses less digits than its factorization.

275221513261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306141899.

The product of its digits is 50400, while the sum is 37.

The spelling of 275221513261 in words is "two hundred seventy-five billion, two hundred twenty-one million, five hundred thirteen thousand, two hundred sixty-one".