1131500025 has 54 divisors (see below), whose sum is σ = 2152992842. Its totient is φ = 567936000.

The previous prime is 1131500017. The next prime is 1131500033. The reversal of 1131500025 is 5200051311.

It is an interprime number because it is at equal distance from previous prime (1131500017) and next prime (1131500033).

It can be written as a sum of positive squares in 9 ways, for example, as 42302016 + 1089198009 = 6504^2 + 33003^2 .

It is not a de Polignac number, because 1131500025 - 2³ = 1131500017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131499980 and 1131500007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 56325 + ... + 73725.

Almost surely, 2^1131500025 is an apocalyptic number.

1131500025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1131500025 is a deficient number, since it is larger than the sum of its proper divisors (1021492817).

1131500025 is a wasteful number, since it uses less digits than its factorization.

1131500025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17451 (or 17426 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 1131500025 is about 33637.7767547143. The cubic root of 1131500025 is about 1042.0411175034.

Adding to 1131500025 its reverse (5200051311), we get a palindrome (6331551336).

The spelling of 1131500025 in words is "one billion, one hundred thirty-one million, five hundred thousand, twenty-five".