4001253531 has 20 divisors (see below), whose sum is σ = 5868533160. Its totient is φ = 2424975520.

The previous prime is 4001253401. The next prime is 4001253539. The reversal of 4001253531 is 1353521004.

It is not a de Polignac number, because 4001253531 - 2⁹ = 4001253019 is a prime.

It is a super-2 number, since 2×4001253531² = 32020059638679935922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4001253539) 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, 1626 + ... + 89471.

It is an arithmetic number, because the mean of its divisors is an integer number (293426658).

Almost surely, 2^4001253531 is an apocalyptic number.

4001253531 is a deficient number, since it is larger than the sum of its proper divisors (1867279629).

4001253531 is an frugal number, since it uses more digits than its factorization.

4001253531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91144 (or 91111 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 4001253531 is about 63255.4624597750. The cubic root of 4001253531 is about 1587.5668560184.

Adding to 4001253531 its reverse (1353521004), we get a palindrome (5354774535).

The spelling of 4001253531 in words is "four billion, one million, two hundred fifty-three thousand, five hundred thirty-one".