2505531531 has 32 divisors (see below), whose sum is σ = 3552537600. Its totient is φ = 1568286720.

The previous prime is 2505531529. The next prime is 2505531533. The reversal of 2505531531 is 1351355052.

It is an interprime number because it is at equal distance from previous prime (2505531529) and next prime (2505531533).

It is not a de Polignac number, because 2505531531 - 2¹ = 2505531529 is a prime.

It is a super-2 number, since 2×2505531531² = 12555376505670407922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2505531533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 457771 + ... + 463211.

It is an arithmetic number, because the mean of its divisors is an integer number (111016800).

Almost surely, 2^2505531531 is an apocalyptic number.

2505531531 is a deficient number, since it is larger than the sum of its proper divisors (1047006069).

2505531531 is a wasteful number, since it uses less digits than its factorization.

2505531531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5619.

The product of its (nonzero) digits is 11250, while the sum is 30.

The square root of 2505531531 is about 50055.2847459686. The cubic root of 2505531531 is about 1358.2090632805.

Adding to 2505531531 its reverse (1351355052), we get a palindrome (3856886583).

The spelling of 2505531531 in words is "two billion, five hundred five million, five hundred thirty-one thousand, five hundred thirty-one".