42321441997 has 2 divisors, whose sum is σ = 42321441998. Its totient is φ = 42321441996.

The previous prime is 42321441949. The next prime is 42321442021. The reversal of 42321441997 is 79914412324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32077168201 + 10244273796 = 179101^2 + 101214^2 .

It is a cyclic number.

It is not a de Polignac number, because 42321441997 - 2²³ = 42313053389 is a prime.

It is a super-2 number, since 2×42321441997² (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 (42321441697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21160720998 + 21160720999.

It is an arithmetic number, because the mean of its divisors is an integer number (21160720999).

Almost surely, 2^42321441997 is an apocalyptic number.

It is an amenable number.

42321441997 is a deficient number, since it is larger than the sum of its proper divisors (1).

42321441997 is an equidigital number, since it uses as much as digits as its factorization.

42321441997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 46.

The spelling of 42321441997 in words is "forty-two billion, three hundred twenty-one million, four hundred forty-one thousand, nine hundred ninety-seven".