25222121198569 has 9 divisors (see below), whose sum is σ = 25350506930007. Its totient is φ = 25094382482664.

The previous prime is 25222121198557. The next prime is 25222121198591. The reversal of 25222121198569 is 96589112122252.

The square root of 25222121198569 is 5022163.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 19508166408025 + 5713954790544 = 4416805^2 + 2390388^2 .

It is not a de Polignac number, because 25222121198569 - 2⁷ = 25222121198441 is a prime.

It is a super-2 number, since 2×25222121198569² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25222121118569) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 999397819 + ... + 999423055.

It is an arithmetic number, because the mean of its divisors is an integer number (2816722992223).

Almost surely, 2^{25222121198569} is an apocalyptic number.

25222121198569 is the 5022163-rd square number.

25222121198569 is the 2511082-nd centered octagonal number.

It is an amenable number.

25222121198569 is a deficient number, since it is larger than the sum of its proper divisors (128385731438).

25222121198569 is an frugal number, since it uses more digits than its factorization.

25222121198569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50872 (or 25436 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 55.

The spelling of 25222121198569 in words is "twenty-five trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred ninety-eight thousand, five hundred sixty-nine".