348821281 has 2 divisors, whose sum is σ = 348821282. Its totient is φ = 348821280.

The previous prime is 348821233. The next prime is 348821287. The reversal of 348821281 is 182128843.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 348195600 + 625681 = 18660^2 + 791^2 .

It is a cyclic number.

It is not a de Polignac number, because 348821281 - 2¹⁵ = 348788513 is a prime.

It is a super-2 number, since 2×348821281² = 243352572156961922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 348821281.

It is not a weakly prime, because it can be changed into another prime (348821287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174410640 + 174410641.

It is an arithmetic number, because the mean of its divisors is an integer number (174410641).

Almost surely, 2^348821281 is an apocalyptic number.

348821281 is the 8353-rd centered decagonal number.

It is an amenable number.

348821281 is a deficient number, since it is larger than the sum of its proper divisors (1).

348821281 is an equidigital number, since it uses as much as digits as its factorization.

348821281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24576, while the sum is 37.

The square root of 348821281 is about 18676.7577753742. The cubic root of 348821281 is about 703.9378610627.

It can be divided in two parts, 34882 and 1281, that added together give a palindrome (36163).

The spelling of 348821281 in words is "three hundred forty-eight million, eight hundred twenty-one thousand, two hundred eighty-one".