56249999 has 8 divisors (see below), whose sum is σ = 60690000. Its totient is φ = 51826176.

The previous prime is 56249981. The next prime is 56250011. The reversal of 56249999 is 99994265.

It is a Cunningham number, because it is equal to 7500²-1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56249999 is a prime.

It is a Duffinian number.

56249999 is a modest number, since divided by 9999 gives 5624 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 56249999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56249939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3752 + ... + 11250.

It is an arithmetic number, because the mean of its divisors is an integer number (7586250).

Almost surely, 2^56249999 is an apocalyptic number.

56249999 is a deficient number, since it is larger than the sum of its proper divisors (4440001).

56249999 is a wasteful number, since it uses less digits than its factorization.

56249999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8089.

The product of its digits is 1574640, while the sum is 53.

The square root of 56249999 is about 7499.9999333333. Note that the first 4 decimals coincide. The cubic root of 56249999 is about 383.1547139262.

The spelling of 56249999 in words is "fifty-six million, two hundred forty-nine thousand, nine hundred ninety-nine".