25517215130 has 64 divisors (see below), whose sum is σ = 51871363200. Its totient is φ = 8952625920.

The previous prime is 25517215127. The next prime is 25517215133. The reversal of 25517215130 is 3151271552.

It is an interprime number because it is at equal distance from previous prime (25517215127) and next prime (25517215133).

It is a super-2 number, since 2×25517215130² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25517215133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7842584 + ... + 7845836.

It is an arithmetic number, because the mean of its divisors is an integer number (810490050).

Almost surely, 2^25517215130 is an apocalyptic number.

25517215130 is an abundant number, since it is smaller than the sum of its proper divisors (26354148070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25517215130 is a wasteful number, since it uses less digits than its factorization.

25517215130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5759.

The product of its (nonzero) digits is 10500, while the sum is 32.

Adding to 25517215130 its reverse (3151271552), we get a palindrome (28668486682).

The spelling of 25517215130 in words is "twenty-five billion, five hundred seventeen million, two hundred fifteen thousand, one hundred thirty".