42943513 has 4 divisors (see below), whose sum is σ = 45469620. Its totient is φ = 40417408.

The previous prime is 42943489. The next prime is 42943543. The reversal of 42943513 is 31534924.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28174864 + 14768649 = 5308^2 + 3843^2 .

It is a cyclic number.

It is not a de Polignac number, because 42943513 - 2²¹ = 40846361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42943543) 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, 1263028 + ... + 1263061.

It is an arithmetic number, because the mean of its divisors is an integer number (11367405).

Almost surely, 2^42943513 is an apocalyptic number.

It is an amenable number.

42943513 is a deficient number, since it is larger than the sum of its proper divisors (2526107).

42943513 is a wasteful number, since it uses less digits than its factorization.

42943513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526106.

The product of its digits is 12960, while the sum is 31.

The square root of 42943513 is about 6553.1300154964. The cubic root of 42943513 is about 350.1863307168.

The spelling of 42943513 in words is "forty-two million, nine hundred forty-three thousand, five hundred thirteen".