42556101 has 32 divisors (see below), whose sum is σ = 66662400. Its totient is φ = 23647680.

The previous prime is 42556099. The next prime is 42556123. The reversal of 42556101 is 10165524.

It is not a de Polignac number, because 42556101 - 2¹ = 42556099 is a prime.

It is a super-2 number, since 2×42556101² = 3622043464644402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42556001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177940 + ... + 178178.

It is an arithmetic number, because the mean of its divisors is an integer number (2083200).

Almost surely, 2^42556101 is an apocalyptic number.

It is an amenable number.

42556101 is a deficient number, since it is larger than the sum of its proper divisors (24106299).

42556101 is a wasteful number, since it uses less digits than its factorization.

42556101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 42556101 is about 6523.5037364901. The cubic root of 42556101 is about 349.1300872728.

The spelling of 42556101 in words is "forty-two million, five hundred fifty-six thousand, one hundred one".