499999251 has 4 divisors (see below), whose sum is σ = 666665672. Its totient is φ = 333332832.

The previous prime is 499999229. The next prime is 499999259. The reversal of 499999251 is 152999994.

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

It is not a de Polignac number, because 499999251 - 2⁵ = 499999219 is a prime.

It is a super-2 number, since 2×499999251² = 499998502001122002, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 499999191 and 499999200.

It is not an unprimeable number, because it can be changed into a prime (499999259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83333206 + ... + 83333211.

It is an arithmetic number, because the mean of its divisors is an integer number (166666418).

Almost surely, 2^499999251 is an apocalyptic number.

499999251 is a deficient number, since it is larger than the sum of its proper divisors (166666421).

499999251 is a wasteful number, since it uses less digits than its factorization.

499999251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166666420.

The product of its digits is 2361960, while the sum is 57.

The square root of 499999251 is about 22360.6630268425. The cubic root of 499999251 is about 793.7001296628.

The spelling of 499999251 in words is "four hundred ninety-nine million, nine hundred ninety-nine thousand, two hundred fifty-one".