42230406397 has 2 divisors, whose sum is σ = 42230406398. Its totient is φ = 42230406396.

The previous prime is 42230406359. The next prime is 42230406409. The reversal of 42230406397 is 79360403224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41174091396 + 1056315001 = 202914^2 + 32501^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42230406397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42230400397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21115203198 + 21115203199.

It is an arithmetic number, because the mean of its divisors is an integer number (21115203199).

Almost surely, 2^42230406397 is an apocalyptic number.

It is an amenable number.

42230406397 is a deficient number, since it is larger than the sum of its proper divisors (1).

42230406397 is an equidigital number, since it uses as much as digits as its factorization.

42230406397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 40.

The spelling of 42230406397 in words is "forty-two billion, two hundred thirty million, four hundred six thousand, three hundred ninety-seven".