261582803 has 4 divisors (see below), whose sum is σ = 267666168. Its totient is φ = 255499440.

The previous prime is 261582787. The next prime is 261582821. The reversal of 261582803 is 308285162.

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

It is a cyclic number.

It is not a de Polignac number, because 261582803 - 2⁴ = 261582787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261582103) 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, 3041618 + ... + 3041703.

It is an arithmetic number, because the mean of its divisors is an integer number (66916542).

Almost surely, 2^261582803 is an apocalyptic number.

261582803 is a deficient number, since it is larger than the sum of its proper divisors (6083365).

261582803 is an equidigital number, since it uses as much as digits as its factorization.

261582803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6083364.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 261582803 is about 16173.5216635092. The cubic root of 261582803 is about 639.5429704211.

The spelling of 261582803 in words is "two hundred sixty-one million, five hundred eighty-two thousand, eight hundred three".