25315131005 has 8 divisors (see below), whose sum is σ = 30383040600. Its totient is φ = 20248849216.

The previous prime is 25315130989. The next prime is 25315131007. The reversal of 25315131005 is 50013151352.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7648202116 + 17666928889 = 87454^2 + 132917^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25315131005 - 2⁴ = 25315130989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25315131007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372470 + ... + 435159.

It is an arithmetic number, because the mean of its divisors is an integer number (3797880075).

Almost surely, 2^25315131005 is an apocalyptic number.

It is an amenable number.

25315131005 is a deficient number, since it is larger than the sum of its proper divisors (5067909595).

25315131005 is an equidigital number, since it uses as much as digits as its factorization.

25315131005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813903.

The product of its (nonzero) digits is 2250, while the sum is 26.

Adding to 25315131005 its reverse (50013151352), we get a palindrome (75328282357).

The spelling of 25315131005 in words is "twenty-five billion, three hundred fifteen million, one hundred thirty-one thousand, five".