42115513 has 4 divisors (see below), whose sum is σ = 45944208. Its totient is φ = 38286820.

The previous prime is 42115501. The next prime is 42115517. The reversal of 42115513 is 31551124.

It is a happy number.

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 not a de Polignac number, because 42115513 - 2²¹ = 40018361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42115517) 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, 1914331 + ... + 1914352.

It is an arithmetic number, because the mean of its divisors is an integer number (11486052).

Almost surely, 2^42115513 is an apocalyptic number.

It is an amenable number.

42115513 is a deficient number, since it is larger than the sum of its proper divisors (3828695).

42115513 is a wasteful number, since it uses less digits than its factorization.

42115513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3828694.

The product of its digits is 600, while the sum is 22.

The square root of 42115513 is about 6489.6466005477. The cubic root of 42115513 is about 347.9210444252.

Adding to 42115513 its reverse (31551124), we get a palindrome (73666637).

The spelling of 42115513 in words is "forty-two million, one hundred fifteen thousand, five hundred thirteen".