249945715 has 16 divisors (see below), whose sum is σ = 323076096. Its totient is φ = 185090400.

The previous prime is 249945697. The next prime is 249945719. The reversal of 249945715 is 517549942.

It is not a de Polignac number, because 249945715 - 2⁷ = 249945587 is a prime.

It is a super-2 number, since 2×249945715² = 124945720893722450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249945719) 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 15 ways as a sum of consecutive naturals, for example, 31491 + ... + 38620.

It is an arithmetic number, because the mean of its divisors is an integer number (20192256).

Almost surely, 2^249945715 is an apocalyptic number.

249945715 is a deficient number, since it is larger than the sum of its proper divisors (73130381).

249945715 is a wasteful number, since it uses less digits than its factorization.

249945715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70170.

The product of its digits is 453600, while the sum is 46.

The square root of 249945715 is about 15809.6715652160. The cubic root of 249945715 is about 629.9149251040.

The spelling of 249945715 in words is "two hundred forty-nine million, nine hundred forty-five thousand, seven hundred fifteen".