43430132021 has 2 divisors, whose sum is σ = 43430132022. Its totient is φ = 43430132020.

The previous prime is 43430131993. The next prime is 43430132051. The reversal of 43430132021 is 12023103434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43393056100 + 37075921 = 208310^2 + 6089^2 .

It is a cyclic number.

It is not a de Polignac number, because 43430132021 - 2⁶ = 43430131957 is a prime.

It is a super-2 number, since 2×43430132021² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43430132051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21715066010 + 21715066011.

It is an arithmetic number, because the mean of its divisors is an integer number (21715066011).

Almost surely, 2^43430132021 is an apocalyptic number.

It is an amenable number.

43430132021 is a deficient number, since it is larger than the sum of its proper divisors (1).

43430132021 is an equidigital number, since it uses as much as digits as its factorization.

43430132021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 43430132021 its reverse (12023103434), we get a palindrome (55453235455).

The spelling of 43430132021 in words is "forty-three billion, four hundred thirty million, one hundred thirty-two thousand, twenty-one".