25551012 has 48 divisors (see below), whose sum is σ = 61286400. Its totient is φ = 8282400.

The previous prime is 25551011. The next prime is 25551109. The reversal of 25551012 is 21015552.

It is a self number, because there is not a number n which added to its sum of digits gives 25551012.

It is not an unprimeable number, because it can be changed into a prime (25551011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106789 + ... + 107027.

It is an arithmetic number, because the mean of its divisors is an integer number (1276800).

Almost surely, 2^25551012 is an apocalyptic number.

It is an amenable number.

25551012 is an abundant number, since it is smaller than the sum of its proper divisors (35735388).

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

25551012 is a wasteful number, since it uses less digits than its factorization.

25551012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 25551012 is about 5054.8008862862. The cubic root of 25551012 is about 294.5344067921.

Adding to 25551012 its reverse (21015552), we get a palindrome (46566564).

The spelling of 25551012 in words is "twenty-five million, five hundred fifty-one thousand, twelve".