4523431151721 has 16 divisors (see below), whose sum is σ = 6110382432384. Its totient is φ = 2976304792704.

The previous prime is 4523431151719. The next prime is 4523431151731. The reversal of 4523431151721 is 1271511343254.

It is not a de Polignac number, because 4523431151721 - 2¹ = 4523431151719 is a prime.

It is a super-2 number, since 2×4523431151721² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4523431151721.

It is not an unprimeable number, because it can be changed into a prime (4523431151731) 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 in 15 ways as a sum of consecutive naturals, for example, 31737901 + ... + 31880106.

It is an arithmetic number, because the mean of its divisors is an integer number (381898902024).

Almost surely, 2^{4523431151721} is an apocalyptic number.

It is an amenable number.

4523431151721 is a deficient number, since it is larger than the sum of its proper divisors (1586951280663).

4523431151721 is a wasteful number, since it uses less digits than its factorization.

4523431151721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63618320.

The product of its digits is 100800, while the sum is 39.

Adding to 4523431151721 its reverse (1271511343254), we get a palindrome (5794942494975).

The spelling of 4523431151721 in words is "four trillion, five hundred twenty-three billion, four hundred thirty-one million, one hundred fifty-one thousand, seven hundred twenty-one".