275490831 has 96 divisors (see below), whose sum is σ = 507907584. Its totient is φ = 128563200.

The previous prime is 275490791. The next prime is 275490833. The reversal of 275490831 is 138094572.

It is not a de Polignac number, because 275490831 - 2⁷ = 275490703 is a prime.

It is a super-2 number, since 2×275490831² = 151790395930141122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 275490831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275490833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3773811 + ... + 3773883.

It is an arithmetic number, because the mean of its divisors is an integer number (5290704).

Almost surely, 2^275490831 is an apocalyptic number.

275490831 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

275490831 is a deficient number, since it is larger than the sum of its proper divisors (232416753).

275490831 is a wasteful number, since it uses less digits than its factorization.

275490831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 275490831 is about 16597.9164656291. The cubic root of 275490831 is about 650.6823847470.

The spelling of 275490831 in words is "two hundred seventy-five million, four hundred ninety thousand, eight hundred thirty-one".