43280261 has 2 divisors, whose sum is σ = 43280262. Its totient is φ = 43280260.

The previous prime is 43280257. The next prime is 43280339. The reversal of 43280261 is 16208234.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42003361 + 1276900 = 6481^2 + 1130^2 .

It is a cyclic number.

It is not a de Polignac number, because 43280261 - 2² = 43280257 is a prime.

It is a Chen prime.

It is equal to p_2620448 and since 43280261 and 2620448 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43280261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43280201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21640130 + 21640131.

It is an arithmetic number, because the mean of its divisors is an integer number (21640131).

Almost surely, 2^43280261 is an apocalyptic number.

It is an amenable number.

43280261 is a deficient number, since it is larger than the sum of its proper divisors (1).

43280261 is an equidigital number, since it uses as much as digits as its factorization.

43280261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 43280261 is about 6578.7735179135. The cubic root of 43280261 is about 351.0992946947.

Adding to 43280261 its reverse (16208234), we get a palindrome (59488495).

The spelling of 43280261 in words is "forty-three million, two hundred eighty thousand, two hundred sixty-one".