999952251 has 4 divisors (see below), whose sum is σ = 1333269672. Its totient is φ = 666634832.

The previous prime is 999952249. The next prime is 999952253. The reversal of 999952251 is 152259999.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (999952249) and next prime (999952253).

It is a cyclic number.

It is not a de Polignac number, because 999952251 - 2¹ = 999952249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 999952194 and 999952203.

It is not an unprimeable number, because it can be changed into a prime (999952253) 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, 166658706 + ... + 166658711.

It is an arithmetic number, because the mean of its divisors is an integer number (333317418).

Almost surely, 2^999952251 is an apocalyptic number.

999952251 is a deficient number, since it is larger than the sum of its proper divisors (333317421).

999952251 is a wasteful number, since it uses less digits than its factorization.

999952251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333317420.

The product of its digits is 656100, while the sum is 51.

The square root of 999952251 is about 31622.0216146912. The cubic root of 999952251 is about 999.9840834133.

The spelling of 999952251 in words is "nine hundred ninety-nine million, nine hundred fifty-two thousand, two hundred fifty-one".