42958022981 has 2 divisors, whose sum is σ = 42958022982. Its totient is φ = 42958022980.

The previous prime is 42958022957. The next prime is 42958022999. The reversal of 42958022981 is 18922085924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32172161956 + 10785861025 = 179366^2 + 103855^2 .

It is a cyclic number.

It is not a de Polignac number, because 42958022981 - 2¹⁸ = 42957760837 is a prime.

It is a super-2 number, since 2×42958022981² (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 (42958022911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21479011490 + 21479011491.

It is an arithmetic number, because the mean of its divisors is an integer number (21479011491).

Almost surely, 2^42958022981 is an apocalyptic number.

It is an amenable number.

42958022981 is a deficient number, since it is larger than the sum of its proper divisors (1).

42958022981 is an equidigital number, since it uses as much as digits as its factorization.

42958022981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 50.

The spelling of 42958022981 in words is "forty-two billion, nine hundred fifty-eight million, twenty-two thousand, nine hundred eighty-one".