248782261 has 12 divisors (see below), whose sum is σ = 311662092. Its totient is φ = 196838208.

The previous prime is 248782253. The next prime is 248782277. The reversal of 248782261 is 162287842.

It can be written as a sum of positive squares in 2 ways, for example, as 56100100 + 192682161 = 7490^2 + 13881^2 .

It is not a de Polignac number, because 248782261 - 2³ = 248782253 is a prime.

It is a super-2 number, since 2×248782261² = 123785226776544242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248782241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 194640 + ... + 195913.

It is an arithmetic number, because the mean of its divisors is an integer number (25971841).

Almost surely, 2^248782261 is an apocalyptic number.

It is an amenable number.

248782261 is a deficient number, since it is larger than the sum of its proper divisors (62879831).

248782261 is a wasteful number, since it uses less digits than its factorization.

248782261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390580 (or 390573 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The square root of 248782261 is about 15772.8330048853. The cubic root of 248782261 is about 628.9360230417.

It can be divided in two parts, 2487 and 82261, that added together give a palindrome (84748).

The spelling of 248782261 in words is "two hundred forty-eight million, seven hundred eighty-two thousand, two hundred sixty-one".