481181391 has 20 divisors (see below), whose sum is σ = 719421472. Its totient is φ = 320511168.

The previous prime is 481181387. The next prime is 481181399. The reversal of 481181391 is 193181184.

It is not a de Polignac number, because 481181391 - 2² = 481181387 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 (481181399) 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 19 ways as a sum of consecutive naturals, for example, 142266 + ... + 145608.

Almost surely, 2^481181391 is an apocalyptic number.

481181391 is a deficient number, since it is larger than the sum of its proper divisors (238240081).

481181391 is a wasteful number, since it uses less digits than its factorization.

481181391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5132 (or 5123 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 481181391 is about 21935.8471685048. The cubic root of 481181391 is about 783.6153615932.

The spelling of 481181391 in words is "four hundred eighty-one million, one hundred eighty-one thousand, three hundred ninety-one".