1531250025 has 24 divisors (see below), whose sum is σ = 2618969280. Its totient is φ = 788504640.

The previous prime is 1531250011. The next prime is 1531250057. The reversal of 1531250025 is 5200521351.

It is a happy number.

It is not a de Polignac number, because 1531250025 - 2⁷ = 1531249897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1531249977 and 1531250004.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 349837 + ... + 354186.

It is an arithmetic number, because the mean of its divisors is an integer number (109123720).

Almost surely, 2^1531250025 is an apocalyptic number.

1531250025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1531250025 is a deficient number, since it is larger than the sum of its proper divisors (1087719255).

1531250025 is a wasteful number, since it uses less digits than its factorization.

1531250025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704065 (or 704060 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 1531250025 is about 39131.1899256846. The cubic root of 1531250025 is about 1152.6090792873.

Adding to 1531250025 its reverse (5200521351), we get a palindrome (6731771376).

The spelling of 1531250025 in words is "one billion, five hundred thirty-one million, two hundred fifty thousand, twenty-five".