25522749251 has 4 divisors (see below), whose sum is σ = 25523844600. Its totient is φ = 25521653904.

The previous prime is 25522749233. The next prime is 25522749299. The reversal of 25522749251 is 15294722552.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25522749251 is a prime.

It is a super-2 number, since 2×25522749251² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25522743251) 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 3 ways as a sum of consecutive naturals, for example, 511946 + ... + 559583.

It is an arithmetic number, because the mean of its divisors is an integer number (6380961150).

Almost surely, 2^25522749251 is an apocalyptic number.

25522749251 is a deficient number, since it is larger than the sum of its proper divisors (1095349).

25522749251 is a wasteful number, since it uses less digits than its factorization.

25522749251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095348.

The product of its digits is 504000, while the sum is 44.

The spelling of 25522749251 in words is "twenty-five billion, five hundred twenty-two million, seven hundred forty-nine thousand, two hundred fifty-one".