2001031525 has 12 divisors (see below), whose sum is σ = 2482081092. Its totient is φ = 1600307840.

The previous prime is 2001031507. The next prime is 2001031537. The reversal of 2001031525 is 5251301002.

It can be written as a sum of positive squares in 6 ways, for example, as 5354596 + 1995676929 = 2314^2 + 44673^2 .

It is not a de Polignac number, because 2001031525 - 2¹⁹ = 2000507237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78687 + ... + 100963.

It is an arithmetic number, because the mean of its divisors is an integer number (206840091).

Almost surely, 2^2001031525 is an apocalyptic number.

2001031525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2001031525 is a deficient number, since it is larger than the sum of its proper divisors (481049567).

2001031525 is a wasteful number, since it uses less digits than its factorization.

2001031525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25880 (or 25875 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 2001031525 is about 44732.8908634352. The cubic root of 2001031525 is about 1260.1376193432.

Adding to 2001031525 its reverse (5251301002), we get a palindrome (7252332527).

The spelling of 2001031525 in words is "two billion, one million, thirty-one thousand, five hundred twenty-five".