25263223021 has 8 divisors (see below), whose sum is σ = 25518931200. Its totient is φ = 25007624400.

The previous prime is 25263223019. The next prime is 25263223033. The reversal of 25263223021 is 12032236252.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 25263223021 - 2¹ = 25263223019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25263223091) 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, 484120 + ... + 533758.

It is an arithmetic number, because the mean of its divisors is an integer number (3189866400).

Almost surely, 2^25263223021 is an apocalyptic number.

It is an amenable number.

25263223021 is a deficient number, since it is larger than the sum of its proper divisors (255708179).

25263223021 is a wasteful number, since it uses less digits than its factorization.

25263223021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54779.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 25263223021 its reverse (12032236252), we get a palindrome (37295459273).

It can be divided in two parts, 252632 and 23021, that added together give a triangular number (275653 = T₇₄₂).

The spelling of 25263223021 in words is "twenty-five billion, two hundred sixty-three million, two hundred twenty-three thousand, twenty-one".