999970000225 has 27 divisors (see below), whose sum is σ = 1442456193171. Its totient is φ = 685669714800.

The previous prime is 999970000201. The next prime is 999970000279. The reversal of 999970000225 is 522000079999.

The square root of 999970000225 is 999985.

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., 359989200081 + 639980800144 = 599991^2 + 799988^2 .

It is not a de Polignac number, because 999970000225 - 2⁷ = 999970000097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 34985190 + ... + 35013760.

Almost surely, 2^999970000225 is an apocalyptic number.

999970000225 is the 999985-th square number.

999970000225 is the 499993-rd centered octagonal number.

It is an amenable number.

999970000225 is a deficient number, since it is larger than the sum of its proper divisors (442486192946).

999970000225 is an frugal number, since it uses more digits than its factorization.

999970000225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57166 (or 28583 counting only the distinct ones).

The product of its (nonzero) digits is 918540, while the sum is 52.

The spelling of 999970000225 in words is "nine hundred ninety-nine billion, nine hundred seventy million, two hundred twenty-five", and thus it is an aban number.