2442185781 has 32 divisors (see below), whose sum is σ = 3830899968. Its totient is φ = 1355028480.

The previous prime is 2442185773. The next prime is 2442185807. The reversal of 2442185781 is 1875812442.

It is not a de Polignac number, because 2442185781 - 2³ = 2442185773 is a prime.

It is a super-2 number, since 2×2442185781² = 11928542777837159922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2442185771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96651 + ... + 119271.

It is an arithmetic number, because the mean of its divisors is an integer number (119715624).

Almost surely, 2^2442185781 is an apocalyptic number.

2442185781 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2442185781 is a deficient number, since it is larger than the sum of its proper divisors (1388714187).

2442185781 is a wasteful number, since it uses less digits than its factorization.

2442185781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22781.

The product of its digits is 143360, while the sum is 42.

The square root of 2442185781 is about 49418.4761096495. The cubic root of 2442185781 is about 1346.6649789692.

The spelling of 2442185781 in words is "two billion, four hundred forty-two million, one hundred eighty-five thousand, seven hundred eighty-one".