25551402 has 8 divisors (see below), whose sum is σ = 51102816. Its totient is φ = 8517132.

The previous prime is 25551389. The next prime is 25551431. The reversal of 25551402 is 20415552.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

25551402 is an admirable number.

It is a plaindrome in base 15.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2129278 + ... + 2129289.

It is an arithmetic number, because the mean of its divisors is an integer number (6387852).

Almost surely, 2^25551402 is an apocalyptic number.

25551402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25551402 is a wasteful number, since it uses less digits than its factorization.

25551402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4258572.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 25551402 is about 5054.8394633262. The cubic root of 25551402 is about 294.5359053347.

Adding to 25551402 its reverse (20415552), we get a palindrome (45966954).

The spelling of 25551402 in words is "twenty-five million, five hundred fifty-one thousand, four hundred two".