275005551 has 4 divisors (see below), whose sum is σ = 366674072. Its totient is φ = 183337032.

The previous prime is 275005547. The next prime is 275005561. The reversal of 275005551 is 155500572.

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

It is not a de Polignac number, because 275005551 - 2² = 275005547 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 (275005561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45834256 + ... + 45834261.

It is an arithmetic number, because the mean of its divisors is an integer number (91668518).

Almost surely, 2^275005551 is an apocalyptic number.

275005551 is a deficient number, since it is larger than the sum of its proper divisors (91668521).

275005551 is an equidigital number, since it uses as much as digits as its factorization.

275005551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91668520.

The product of its (nonzero) digits is 8750, while the sum is 30.

The square root of 275005551 is about 16583.2913198798. The cubic root of 275005551 is about 650.3000989012.

The spelling of 275005551 in words is "two hundred seventy-five million, five thousand, five hundred fifty-one".