43220423951 has 2 divisors, whose sum is σ = 43220423952. Its totient is φ = 43220423950.

The previous prime is 43220423947. The next prime is 43220424017. The reversal of 43220423951 is 15932402234.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43220423951 - 2² = 43220423947 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43220123951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21610211975 + 21610211976.

It is an arithmetic number, because the mean of its divisors is an integer number (21610211976).

Almost surely, 2^43220423951 is an apocalyptic number.

43220423951 is a deficient number, since it is larger than the sum of its proper divisors (1).

43220423951 is an equidigital number, since it uses as much as digits as its factorization.

43220423951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 43220423951 in words is "forty-three billion, two hundred twenty million, four hundred twenty-three thousand, nine hundred fifty-one".