248249731 has 4 divisors (see below), whose sum is σ = 249133464. Its totient is φ = 247366000.

The previous prime is 248249719. The next prime is 248249753. The reversal of 248249731 is 137942842.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137942842 = 2 ⋅68971421.

It is a cyclic number.

It is not a de Polignac number, because 248249731 - 2²³ = 239861123 is a prime.

It is a super-2 number, since 2×248249731² = 123255857883144722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (248249791) 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, 441445 + ... + 442006.

It is an arithmetic number, because the mean of its divisors is an integer number (62283366).

Almost surely, 2^248249731 is an apocalyptic number.

248249731 is a deficient number, since it is larger than the sum of its proper divisors (883733).

248249731 is an equidigital number, since it uses as much as digits as its factorization.

248249731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883732.

The product of its digits is 96768, while the sum is 40.

The square root of 248249731 is about 15755.9427201294. The cubic root of 248249731 is about 628.4869468637.

The spelling of 248249731 in words is "two hundred forty-eight million, two hundred forty-nine thousand, seven hundred thirty-one".