42250988281 has 2 divisors, whose sum is σ = 42250988282. Its totient is φ = 42250988280.

The previous prime is 42250988261. The next prime is 42250988321. The reversal of 42250988281 is 18288905224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39368909056 + 2882079225 = 198416^2 + 53685^2 .

It is a cyclic number.

It is not a de Polignac number, because 42250988281 - 2¹¹ = 42250986233 is a prime.

It is a super-2 number, since 2×42250988281² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42250988261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21125494140 + 21125494141.

It is an arithmetic number, because the mean of its divisors is an integer number (21125494141).

Almost surely, 2^42250988281 is an apocalyptic number.

It is an amenable number.

42250988281 is a deficient number, since it is larger than the sum of its proper divisors (1).

42250988281 is an equidigital number, since it uses as much as digits as its factorization.

42250988281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 737280, while the sum is 49.

The spelling of 42250988281 in words is "forty-two billion, two hundred fifty million, nine hundred eighty-eight thousand, two hundred eighty-one".