25531331212 has 6 divisors (see below), whose sum is σ = 44679829628. Its totient is φ = 12765665604.

The previous prime is 25531331207. The next prime is 25531331213. The reversal of 25531331212 is 21213313552.

It is not an unprimeable number, because it can be changed into a prime (25531331213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3191416398 + ... + 3191416405.

Almost surely, 2^25531331212 is an apocalyptic number.

It is an amenable number.

25531331212 is a deficient number, since it is larger than the sum of its proper divisors (19148498416).

25531331212 is a wasteful number, since it uses less digits than its factorization.

25531331212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6382832807 (or 6382832805 counting only the distinct ones).

The product of its digits is 5400, while the sum is 28.

Adding to 25531331212 its reverse (21213313552), we get a palindrome (46744644764).

The spelling of 25531331212 in words is "twenty-five billion, five hundred thirty-one million, three hundred thirty-one thousand, two hundred twelve".