25216403242 has 32 divisors (see below), whose sum is σ = 40042080000. Its totient is φ = 11876746176.

The previous prime is 25216403231. The next prime is 25216403287. The reversal of 25216403242 is 24230461252.

It is a super-2 number, since 2×25216403242² (a number of 22 digits) contains 22 as substring.

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 in 15 ways as a sum of consecutive naturals, for example, 9039984 + ... + 9042772.

It is an arithmetic number, because the mean of its divisors is an integer number (1251315000).

Almost surely, 2^25216403242 is an apocalyptic number.

25216403242 is a deficient number, since it is larger than the sum of its proper divisors (14825676758).

25216403242 is a wasteful number, since it uses less digits than its factorization.

25216403242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4078.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 25216403242 its reverse (24230461252), we get a palindrome (49446864494).

The spelling of 25216403242 in words is "twenty-five billion, two hundred sixteen million, four hundred three thousand, two hundred forty-two".