43312220957 has 2 divisors, whose sum is σ = 43312220958. Its totient is φ = 43312220956.

The previous prime is 43312220923. The next prime is 43312221011. The reversal of 43312220957 is 75902221334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43236548356 + 75672601 = 207934^2 + 8699^2 .

It is a cyclic number.

It is not a de Polignac number, because 43312220957 - 2¹⁶ = 43312155421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43312220957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43312220657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21656110478 + 21656110479.

It is an arithmetic number, because the mean of its divisors is an integer number (21656110479).

Almost surely, 2^43312220957 is an apocalyptic number.

It is an amenable number.

43312220957 is a deficient number, since it is larger than the sum of its proper divisors (1).

43312220957 is an equidigital number, since it uses as much as digits as its factorization.

43312220957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 43312220957 in words is "forty-three billion, three hundred twelve million, two hundred twenty thousand, nine hundred fifty-seven".