248028731 has 4 divisors (see below), whose sum is σ = 248286192. Its totient is φ = 247771272.

The previous prime is 248028689. The next prime is 248028763. The reversal of 248028731 is 137820842.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137820842 = 2 ⋅68910421.

It is a cyclic number.

It is not a de Polignac number, because 248028731 - 2⁶ = 248028667 is a prime.

It is a super-2 number, since 2×248028731² = 123036502802940722, 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 = 248028691 and 248028700.

It is not an unprimeable number, because it can be changed into a prime (248028031) 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, 127280 + ... + 129213.

It is an arithmetic number, because the mean of its divisors is an integer number (62071548).

Almost surely, 2^248028731 is an apocalyptic number.

248028731 is a deficient number, since it is larger than the sum of its proper divisors (257461).

248028731 is an equidigital number, since it uses as much as digits as its factorization.

248028731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257460.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 248028731 is about 15748.9279317673. The cubic root of 248028731 is about 628.3003916402.

It can be divided in two parts, 24802 and 8731, that added together give a palindrome (33533).

The spelling of 248028731 in words is "two hundred forty-eight million, twenty-eight thousand, seven hundred thirty-one".