25030631 has 4 divisors (see below), whose sum is σ = 25112472. Its totient is φ = 24948792.

The previous prime is 25030591. The next prime is 25030633. The reversal of 25030631 is 13603052.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25030631 - 2¹⁰ = 25029607 is a prime.

It is a super-2 number, since 2×25030631² = 1253064976516322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25030633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40460 + ... + 41073.

It is an arithmetic number, because the mean of its divisors is an integer number (6278118).

Almost surely, 2^25030631 is an apocalyptic number.

25030631 is a deficient number, since it is larger than the sum of its proper divisors (81841).

25030631 is an equidigital number, since it uses as much as digits as its factorization.

25030631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81840.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 25030631 is about 5003.0621623162. The cubic root of 25030631 is about 292.5211458645.

Adding to 25030631 its reverse (13603052), we get a palindrome (38633683).

The spelling of 25030631 in words is "twenty-five million, thirty thousand, six hundred thirty-one".