813027261 has 16 divisors (see below), whose sum is σ = 1169463744. Its totient is φ = 500507904.

The previous prime is 813027251. The next prime is 813027277. The reversal of 813027261 is 162720318.

It is not a de Polignac number, because 813027261 - 2⁷ = 813027133 is a prime.

It is a super-2 number, since 2×813027261² = 1322026654258324242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813027251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147691 + ... + 153096.

It is an arithmetic number, because the mean of its divisors is an integer number (73091484).

Almost surely, 2^813027261 is an apocalyptic number.

It is an amenable number.

813027261 is a deficient number, since it is larger than the sum of its proper divisors (356436483).

813027261 is a wasteful number, since it uses less digits than its factorization.

813027261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300860.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 813027261 is about 28513.6328972651. The cubic root of 813027261 is about 933.3295924878.

Adding to 813027261 its reverse (162720318), we get a palindrome (975747579).

The spelling of 813027261 in words is "eight hundred thirteen million, twenty-seven thousand, two hundred sixty-one".