25223054533 has 4 divisors (see below), whose sum is σ = 25223580268. Its totient is φ = 25222528800.

The previous prime is 25223054503. The next prime is 25223054543. The reversal of 25223054533 is 33545032252.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8505081729 + 16717972804 = 92223^2 + 129298^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25223054533 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 (25223054503) 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, 182766 + ... + 289567.

It is an arithmetic number, because the mean of its divisors is an integer number (6305895067).

Almost surely, 2^25223054533 is an apocalyptic number.

It is an amenable number.

25223054533 is a deficient number, since it is larger than the sum of its proper divisors (525735).

25223054533 is an equidigital number, since it uses as much as digits as its factorization.

25223054533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525734.

The product of its (nonzero) digits is 108000, while the sum is 34.

Adding to 25223054533 its reverse (33545032252), we get a palindrome (58768086785).

The spelling of 25223054533 in words is "twenty-five billion, two hundred twenty-three million, fifty-four thousand, five hundred thirty-three".