25030531 has 4 divisors (see below), whose sum is σ = 25040632. Its totient is φ = 25020432.

The previous prime is 25030519. The next prime is 25030561. The reversal of 25030531 is 13503052.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25030531 - 2²³ = 16641923 is a prime.

It is a super-2 number, since 2×25030531² = 1253054964283922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25030499 and 25030508.

It is not an unprimeable number, because it can be changed into a prime (25030561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1495 + ... + 7231.

It is an arithmetic number, because the mean of its divisors is an integer number (6260158).

Almost surely, 2^25030531 is an apocalyptic number.

25030531 is a deficient number, since it is larger than the sum of its proper divisors (10101).

25030531 is an equidigital number, since it uses as much as digits as its factorization.

25030531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10100.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 25030531 is about 5003.0521684268. The cubic root of 25030531 is about 292.5207563131.

Adding to 25030531 its reverse (13503052), we get a palindrome (38533583).

The spelling of 25030531 in words is "twenty-five million, thirty thousand, five hundred thirty-one".