42550513 has 4 divisors (see below), whose sum is σ = 43149888. Its totient is φ = 41951140.

The previous prime is 42550499. The next prime is 42550537. The reversal of 42550513 is 31505524.

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 42550513 - 2¹⁷ = 42419441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42550913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299581 + ... + 299722.

It is an arithmetic number, because the mean of its divisors is an integer number (10787472).

Almost surely, 2^42550513 is an apocalyptic number.

It is an amenable number.

42550513 is a deficient number, since it is larger than the sum of its proper divisors (599375).

42550513 is an equidigital number, since it uses as much as digits as its factorization.

42550513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599374.

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

The square root of 42550513 is about 6523.0754249817. The cubic root of 42550513 is about 349.1148052938.

The spelling of 42550513 in words is "forty-two million, five hundred fifty thousand, five hundred thirteen".