42255455197 has 2 divisors, whose sum is σ = 42255455198. Its totient is φ = 42255455196.

The previous prime is 42255455183. The next prime is 42255455267. The reversal of 42255455197 is 79155455224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40919625796 + 1335829401 = 202286^2 + 36549^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42255455197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42255455197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42255455147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21127727598 + 21127727599.

It is an arithmetic number, because the mean of its divisors is an integer number (21127727599).

Almost surely, 2^42255455197 is an apocalyptic number.

It is an amenable number.

42255455197 is a deficient number, since it is larger than the sum of its proper divisors (1).

42255455197 is an equidigital number, since it uses as much as digits as its factorization.

42255455197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520000, while the sum is 49.

The spelling of 42255455197 in words is "forty-two billion, two hundred fifty-five million, four hundred fifty-five thousand, one hundred ninety-seven".