25227121951 has 4 divisors (see below), whose sum is σ = 25244654400. Its totient is φ = 25209589504.

The previous prime is 25227121939. The next prime is 25227121957. The reversal of 25227121951 is 15912172252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25227121951 - 2¹⁷ = 25226990879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25227121951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25227121957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8764066 + ... + 8766943.

It is an arithmetic number, because the mean of its divisors is an integer number (6311163600).

Almost surely, 2^25227121951 is an apocalyptic number.

25227121951 is a deficient number, since it is larger than the sum of its proper divisors (17532449).

25227121951 is a wasteful number, since it uses less digits than its factorization.

25227121951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17532448.

The product of its digits is 25200, while the sum is 37.

The spelling of 25227121951 in words is "twenty-five billion, two hundred twenty-seven million, one hundred twenty-one thousand, nine hundred fifty-one".