6721452531 has 24 divisors (see below), whose sum is σ = 9766280160. Its totient is φ = 4454505216.

The previous prime is 6721452511. The next prime is 6721452533. The reversal of 6721452531 is 1352541276.

6721452531 is a `hidden beast` number, since 6 + 72 + 1 + 4 + 52 + 531 = 666.

It is not a de Polignac number, because 6721452531 - 2¹⁹ = 6720928243 is a prime.

It is a super-2 number, since 2×6721452531² = 90355848252972611922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6721452533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1085761 + ... + 1091933.

It is an arithmetic number, because the mean of its divisors is an integer number (406928340).

Almost surely, 2^6721452531 is an apocalyptic number.

6721452531 is a deficient number, since it is larger than the sum of its proper divisors (3044827629).

6721452531 is a wasteful number, since it uses less digits than its factorization.

6721452531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6875 (or 6872 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 6721452531 is about 81984.4651809110. The cubic root of 6721452531 is about 1887.2135465529.

The spelling of 6721452531 in words is "six billion, seven hundred twenty-one million, four hundred fifty-two thousand, five hundred thirty-one".