25041221511 has 8 divisors (see below), whose sum is σ = 33416286960. Its totient is φ = 16680151872.

The previous prime is 25041221501. The next prime is 25041221521. The reversal of 25041221511 is 11512214052.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25041221501) and next prime (25041221521).

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

It is not a de Polignac number, because 25041221511 - 2¹⁸ = 25040959367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25041221501) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3494776 + ... + 3501933.

It is an arithmetic number, because the mean of its divisors is an integer number (4177035870).

Almost surely, 2^25041221511 is an apocalyptic number.

25041221511 is a deficient number, since it is larger than the sum of its proper divisors (8375065449).

25041221511 is a wasteful number, since it uses less digits than its factorization.

25041221511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6997905.

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 25041221511 its reverse (11512214052), we get a palindrome (36553435563).

The spelling of 25041221511 in words is "twenty-five billion, forty-one million, two hundred twenty-one thousand, five hundred eleven".