2042190581 has 2 divisors, whose sum is σ = 2042190582. Its totient is φ = 2042190580.

The previous prime is 2042190517. The next prime is 2042190587. The reversal of 2042190581 is 1850912402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1831069681 + 211120900 = 42791^2 + 14530^2 .

It is a cyclic number.

It is not a de Polignac number, because 2042190581 - 2⁶ = 2042190517 is a prime.

It is a super-2 number, since 2×2042190581² = 8341084738250235122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2042190587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021095290 + 1021095291.

It is an arithmetic number, because the mean of its divisors is an integer number (1021095291).

Almost surely, 2^2042190581 is an apocalyptic number.

It is an amenable number.

2042190581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2042190581 is an equidigital number, since it uses as much as digits as its factorization.

2042190581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 2042190581 is about 45190.6027952715. The cubic root of 2042190581 is about 1268.7189390634.

The spelling of 2042190581 in words is "two billion, forty-two million, one hundred ninety thousand, five hundred eighty-one".