42557811 has 8 divisors (see below), whose sum is σ = 56893440. Its totient is φ = 28297032.

The previous prime is 42557791. The next prime is 42557813. The reversal of 42557811 is 11875524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42557811 - 2⁶ = 42557747 is a prime.

It is a super-2 number, since 2×42557811² = 3622334554223442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42557813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17371 + ... + 19668.

It is an arithmetic number, because the mean of its divisors is an integer number (7111680).

Almost surely, 2^42557811 is an apocalyptic number.

42557811 is a deficient number, since it is larger than the sum of its proper divisors (14335629).

42557811 is a wasteful number, since it uses less digits than its factorization.

42557811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37425.

The product of its digits is 11200, while the sum is 33.

The square root of 42557811 is about 6523.6347997110. The cubic root of 42557811 is about 349.1347634879.

The spelling of 42557811 in words is "forty-two million, five hundred fifty-seven thousand, eight hundred eleven".