25542142212 has 12 divisors (see below), whose sum is σ = 59598331856. Its totient is φ = 8514047400.

The previous prime is 25542142211. The next prime is 25542142243. The reversal of 25542142212 is 21224124552.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 25542142212.

It is not an unprimeable number, because it can be changed into a prime (25542142211) 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, 1064255914 + ... + 1064255937.

Almost surely, 2^25542142212 is an apocalyptic number.

It is an amenable number.

25542142212 is an abundant number, since it is smaller than the sum of its proper divisors (34056189644).

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

25542142212 is a wasteful number, since it uses less digits than its factorization.

25542142212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128511858 (or 2128511856 counting only the distinct ones).

The product of its digits is 12800, while the sum is 30.

Adding to 25542142212 its reverse (21224124552), we get a palindrome (46766266764).

The spelling of 25542142212 in words is "twenty-five billion, five hundred forty-two million, one hundred forty-two thousand, two hundred twelve".