42813081 has 6 divisors (see below), whose sum is σ = 61841130. Its totient is φ = 28542048.

The previous prime is 42813049. The next prime is 42813151. The reversal of 42813081 is 18031824.

It can be written as a sum of positive squares in only one way, i.e., 30702681 + 12110400 = 5541^2 + 3480^2 .

It is not a de Polignac number, because 42813081 - 2⁵ = 42813049 is a prime.

It is a super-2 number, since 2×42813081² = 3665919809425122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42813011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2378496 + ... + 2378513.

It is an arithmetic number, because the mean of its divisors is an integer number (10306855).

Almost surely, 2^42813081 is an apocalyptic number.

It is an amenable number.

42813081 is a deficient number, since it is larger than the sum of its proper divisors (19028049).

42813081 is a wasteful number, since it uses less digits than its factorization.

42813081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4757015 (or 4757012 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 42813081 is about 6543.1705617384. The cubic root of 42813081 is about 349.8314317518.

The spelling of 42813081 in words is "forty-two million, eight hundred thirteen thousand, eighty-one".