25212530505 has 16 divisors (see below), whose sum is σ = 40493439360. Its totient is φ = 13395552768.

The previous prime is 25212530479. The next prime is 25212530509. The reversal of 25212530505 is 50503521252.

It is not a de Polignac number, because 25212530505 - 2¹⁹ = 25212006217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25212530509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3191560 + ... + 3199449.

It is an arithmetic number, because the mean of its divisors is an integer number (2530839960).

Almost surely, 2^25212530505 is an apocalyptic number.

It is an amenable number.

25212530505 is a deficient number, since it is larger than the sum of its proper divisors (15280908855).

25212530505 is a wasteful number, since it uses less digits than its factorization.

25212530505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6391280.

The product of its (nonzero) digits is 15000, while the sum is 30.

The spelling of 25212530505 in words is "twenty-five billion, two hundred twelve million, five hundred thirty thousand, five hundred five".