248438261 has 4 divisors (see below), whose sum is σ = 248470572. Its totient is φ = 248405952.

The previous prime is 248438257. The next prime is 248438291. The reversal of 248438261 is 162834842.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 162834842 = 2 ⋅81417421.

It can be written as a sum of positive squares in 2 ways, for example, as 65918161 + 182520100 = 8119^2 + 13510^2 .

It is a cyclic number.

It is not a de Polignac number, because 248438261 - 2² = 248438257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248438251) 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, 2765 + ... + 22461.

It is an arithmetic number, because the mean of its divisors is an integer number (62117643).

Almost surely, 2^248438261 is an apocalyptic number.

It is an amenable number.

248438261 is a deficient number, since it is larger than the sum of its proper divisors (32311).

248438261 is a wasteful number, since it uses less digits than its factorization.

248438261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32310.

The product of its digits is 73728, while the sum is 38.

The square root of 248438261 is about 15761.9244066199. The cubic root of 248438261 is about 628.6460053265.

The spelling of 248438261 in words is "two hundred forty-eight million, four hundred thirty-eight thousand, two hundred sixty-one".