471147521491 has 2 divisors, whose sum is σ = 471147521492. Its totient is φ = 471147521490.

The previous prime is 471147521473. The next prime is 471147521503. The reversal of 471147521491 is 194125741174.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 471147521491 - 2¹⁵ = 471147488723 is a prime.

It is a super-2 number, since 2×471147521491² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (471147521461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235573760745 + 235573760746.

It is an arithmetic number, because the mean of its divisors is an integer number (235573760746).

Almost surely, 2^471147521491 is an apocalyptic number.

471147521491 is a deficient number, since it is larger than the sum of its proper divisors (1).

471147521491 is an equidigital number, since it uses as much as digits as its factorization.

471147521491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 46.

The spelling of 471147521491 in words is "four hundred seventy-one billion, one hundred forty-seven million, five hundred twenty-one thousand, four hundred ninety-one".