42055513 has 4 divisors (see below), whose sum is σ = 42290640. Its totient is φ = 41820388.

The previous prime is 42055511. The next prime is 42055543. The reversal of 42055513 is 31555024.

42055513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42055513 - 2¹ = 42055511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42055511) 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 3 ways as a sum of consecutive naturals, for example, 117295 + ... + 117652.

It is an arithmetic number, because the mean of its divisors is an integer number (10572660).

Almost surely, 2^42055513 is an apocalyptic number.

It is an amenable number.

42055513 is a deficient number, since it is larger than the sum of its proper divisors (235127).

42055513 is a wasteful number, since it uses less digits than its factorization.

42055513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235126.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 42055513 is about 6485.0222050507. The cubic root of 42055513 is about 347.7557436262.

The spelling of 42055513 in words is "forty-two million, fifty-five thousand, five hundred thirteen".