43051997 has 2 divisors, whose sum is σ = 43051998. Its totient is φ = 43051996.

The previous prime is 43051993. The next prime is 43052011. The reversal of 43051997 is 79915034.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27520516 + 15531481 = 5246^2 + 3941^2 .

It is a cyclic number.

It is not a de Polignac number, because 43051997 - 2² = 43051993 is a prime.

It is a Chen prime.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 43051997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43051991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21525998 + 21525999.

It is an arithmetic number, because the mean of its divisors is an integer number (21525999).

Almost surely, 2^43051997 is an apocalyptic number.

It is an amenable number.

43051997 is a deficient number, since it is larger than the sum of its proper divisors (1).

43051997 is an equidigital number, since it uses as much as digits as its factorization.

43051997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 43051997 is about 6561.4020605355. The cubic root of 43051997 is about 350.4809632566.

The spelling of 43051997 in words is "forty-three million, fifty-one thousand, nine hundred ninety-seven".