25244400212 has 6 divisors (see below), whose sum is σ = 44177700378. Its totient is φ = 12622200104.

The previous prime is 25244400197. The next prime is 25244400227. The reversal of 25244400212 is 21200444252.

It is an interprime number because it is at equal distance from previous prime (25244400197) and next prime (25244400227).

It can be written as a sum of positive squares in only one way, i.e., 24299821456 + 944578756 = 155884^2 + 30734^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3155550023 + ... + 3155550030.

It is an arithmetic number, because the mean of its divisors is an integer number (7362950063).

Almost surely, 2^25244400212 is an apocalyptic number.

It is an amenable number.

25244400212 is a deficient number, since it is larger than the sum of its proper divisors (18933300166).

25244400212 is a wasteful number, since it uses less digits than its factorization.

25244400212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6311100057 (or 6311100055 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 26.

Adding to 25244400212 its reverse (21200444252), we get a palindrome (46444844464).

The spelling of 25244400212 in words is "twenty-five billion, two hundred forty-four million, four hundred thousand, two hundred twelve".