1922007913225 has 9 divisors (see below), whose sum is σ = 2383298407893. Its totient is φ = 1537600785120.

The previous prime is 1922007913223. The next prime is 1922007913249. The reversal of 1922007913225 is 5223197002291.

It is a happy number.

The square root of 1922007913225 is 1386365.

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

It can be written as a sum of positive squares in 4 ways, for example, as 56281394169 + 1865726519056 = 237237^2 + 1365916^2 .

It is not a de Polignac number, because 1922007913225 - 2¹ = 1922007913223 is a prime.

It is a super-2 number, since 2×1922007913225² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1922007913223) 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 8 ways as a sum of consecutive naturals, for example, 6793189 + ... + 7070461.

Almost surely, 2^{1922007913225} is an apocalyptic number.

1922007913225 is the 1386365-th square number.

1922007913225 is the 693183-rd centered octagonal number.

It is an amenable number.

1922007913225 is a deficient number, since it is larger than the sum of its proper divisors (461290494668).

1922007913225 is an frugal number, since it uses more digits than its factorization.

1922007913225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554556 (or 277278 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The spelling of 1922007913225 in words is "one trillion, nine hundred twenty-two billion, seven million, nine hundred thirteen thousand, two hundred twenty-five".