461131381 has 2 divisors, whose sum is σ = 461131382. Its totient is φ = 461131380.

The previous prime is 461131361. The next prime is 461131399. The reversal of 461131381 is 183131164.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 460789156 + 342225 = 21466^2 + 585^2 .

It is a cyclic number.

It is not a de Polignac number, because 461131381 - 2¹³ = 461123189 is a prime.

It is a super-2 number, since 2×461131381² = 425284301085934322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (461131361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230565690 + 230565691.

It is an arithmetic number, because the mean of its divisors is an integer number (230565691).

Almost surely, 2^461131381 is an apocalyptic number.

It is an amenable number.

461131381 is a deficient number, since it is larger than the sum of its proper divisors (1).

461131381 is an equidigital number, since it uses as much as digits as its factorization.

461131381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The square root of 461131381 is about 21473.9698472360. The cubic root of 461131381 is about 772.5766165809.

The spelling of 461131381 in words is "four hundred sixty-one million, one hundred thirty-one thousand, three hundred eighty-one".