249140517 has 4 divisors (see below), whose sum is σ = 332187360. Its totient is φ = 166093676.

The previous prime is 249140513. The next prime is 249140557. The reversal of 249140517 is 715041942.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 249140517 - 2² = 249140513 is a prime.

It is a super-2 number, since 2×249140517² = 124141994422054578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249140513) 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, 41523417 + ... + 41523422.

It is an arithmetic number, because the mean of its divisors is an integer number (83046840).

Almost surely, 2^249140517 is an apocalyptic number.

It is an amenable number.

249140517 is a deficient number, since it is larger than the sum of its proper divisors (83046843).

249140517 is an equidigital number, since it uses as much as digits as its factorization.

249140517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83046842.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 249140517 is about 15784.1856616045. The cubic root of 249140517 is about 629.2377755767.

The spelling of 249140517 in words is "two hundred forty-nine million, one hundred forty thousand, five hundred seventeen".