43214681 has 2 divisors, whose sum is σ = 43214682. Its totient is φ = 43214680.

The previous prime is 43214627. The next prime is 43214687. The reversal of 43214681 is 18641234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42133081 + 1081600 = 6491^2 + 1040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43214681 is a prime.

It is a super-2 number, since 2×43214681² = 3735017307863522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43214687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21607340 + 21607341.

It is an arithmetic number, because the mean of its divisors is an integer number (21607341).

Almost surely, 2^43214681 is an apocalyptic number.

It is an amenable number.

43214681 is a deficient number, since it is larger than the sum of its proper divisors (1).

43214681 is an equidigital number, since it uses as much as digits as its factorization.

43214681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 29.

The square root of 43214681 is about 6573.7874167028. The cubic root of 43214681 is about 350.9218717731.

The spelling of 43214681 in words is "forty-three million, two hundred fourteen thousand, six hundred eighty-one".