25531007 has 4 divisors (see below), whose sum is σ = 25593840. Its totient is φ = 25468176.

The previous prime is 25530997. The next prime is 25531013. The reversal of 25531007 is 70013552.

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 25531007 - 2¹⁴ = 25514623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25531607) 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, 30803 + ... + 31620.

It is an arithmetic number, because the mean of its divisors is an integer number (6398460).

Almost surely, 2^25531007 is an apocalyptic number.

25531007 is a deficient number, since it is larger than the sum of its proper divisors (62833).

25531007 is an equidigital number, since it uses as much as digits as its factorization.

25531007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62832.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 25531007 is about 5052.8216869389. The cubic root of 25531007 is about 294.4575187845.

Adding to 25531007 its reverse (70013552), we get a palindrome (95544559).

The spelling of 25531007 in words is "twenty-five million, five hundred thirty-one thousand, seven".