25051212 has 18 divisors (see below), whose sum is σ = 63323988. Its totient is φ = 8350392.

The previous prime is 25051199. The next prime is 25051219. The reversal of 25051212 is 21215052.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (25051219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 347898 + ... + 347969.

Almost surely, 2^25051212 is an apocalyptic number.

It is an amenable number.

25051212 is an abundant number, since it is smaller than the sum of its proper divisors (38272776).

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

25051212 is a wasteful number, since it uses less digits than its factorization.

25051212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695877 (or 695872 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 25051212 is about 5005.1185800139. The cubic root of 25051212 is about 292.6012973718.

Adding to 25051212 its reverse (21215052), we get a palindrome (46266264).

The spelling of 25051212 in words is "twenty-five million, fifty-one thousand, two hundred twelve".