25252521142 has 4 divisors (see below), whose sum is σ = 37878781716. Its totient is φ = 12626260570.

The previous prime is 25252521113. The next prime is 25252521143. The reversal of 25252521142 is 24112525252.

25252521142 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25252521143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6313130284 + ... + 6313130287.

It is an arithmetic number, because the mean of its divisors is an integer number (9469695429).

Almost surely, 2^25252521142 is an apocalyptic number.

25252521142 is a deficient number, since it is larger than the sum of its proper divisors (12626260574).

25252521142 is a wasteful number, since it uses less digits than its factorization.

25252521142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12626260573.

The product of its digits is 16000, while the sum is 31.

The spelling of 25252521142 in words is "twenty-five billion, two hundred fifty-two million, five hundred twenty-one thousand, one hundred forty-two".