4151321491 has 2 divisors, whose sum is σ = 4151321492. Its totient is φ = 4151321490.

The previous prime is 4151321453. The next prime is 4151321501. The reversal of 4151321491 is 1941231514.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4151321491 is a prime.

It is not a weakly prime, because it can be changed into another prime (4151321401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2075660745 + 2075660746.

It is an arithmetic number, because the mean of its divisors is an integer number (2075660746).

Almost surely, 2^4151321491 is an apocalyptic number.

4151321491 is a deficient number, since it is larger than the sum of its proper divisors (1).

4151321491 is an equidigital number, since it uses as much as digits as its factorization.

4151321491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 31.

The square root of 4151321491 is about 64430.7495765803. The cubic root of 4151321491 is about 1607.1711304281.

The spelling of 4151321491 in words is "four billion, one hundred fifty-one million, three hundred twenty-one thousand, four hundred ninety-one".