248234781 has 4 divisors (see below), whose sum is σ = 330979712. Its totient is φ = 165489852.

The previous prime is 248234773. The next prime is 248234783. The reversal of 248234781 is 187432842.

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 not a de Polignac number, because 248234781 - 2³ = 248234773 is a prime.

It is a super-2 number, since 2×248234781² = 123241012996235922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248234783) 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, 41372461 + ... + 41372466.

It is an arithmetic number, because the mean of its divisors is an integer number (82744928).

Almost surely, 2^248234781 is an apocalyptic number.

It is an amenable number.

248234781 is a deficient number, since it is larger than the sum of its proper divisors (82744931).

248234781 is an equidigital number, since it uses as much as digits as its factorization.

248234781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82744930.

The product of its digits is 86016, while the sum is 39.

The square root of 248234781 is about 15755.4682888196. The cubic root of 248234781 is about 628.4743304439.

The spelling of 248234781 in words is "two hundred forty-eight million, two hundred thirty-four thousand, seven hundred eighty-one".