42170000549 has 2 divisors, whose sum is σ = 42170000550. Its totient is φ = 42170000548.

The previous prime is 42170000479. The next prime is 42170000557. The reversal of 42170000549 is 94500007124.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29926578049 + 12243422500 = 172993^2 + 110650^2 .

It is a cyclic number.

It is not a de Polignac number, because 42170000549 - 2¹⁶ = 42169935013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42170030549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21085000274 + 21085000275.

It is an arithmetic number, because the mean of its divisors is an integer number (21085000275).

Almost surely, 2^42170000549 is an apocalyptic number.

It is an amenable number.

42170000549 is a deficient number, since it is larger than the sum of its proper divisors (1).

42170000549 is an equidigital number, since it uses as much as digits as its factorization.

42170000549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 42170000549 in words is "forty-two billion, one hundred seventy million, five hundred forty-nine", and thus it is an aban number.