42186513 has 4 divisors (see below), whose sum is σ = 56248688. Its totient is φ = 28124340.

The previous prime is 42186511. The next prime is 42186523. The reversal of 42186513 is 31568124.

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 42186513 - 2¹ = 42186511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42186511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7031083 + ... + 7031088.

It is an arithmetic number, because the mean of its divisors is an integer number (14062172).

Almost surely, 2^42186513 is an apocalyptic number.

It is an amenable number.

42186513 is a deficient number, since it is larger than the sum of its proper divisors (14062175).

42186513 is a wasteful number, since it uses less digits than its factorization.

42186513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14062174.

The product of its digits is 5760, while the sum is 30.

The square root of 42186513 is about 6495.1145486435. The cubic root of 42186513 is about 348.1164476861.

It can be divided in two parts, 4218 and 6513, that added together give a triangular number (10731 = T₁₄₆).

The spelling of 42186513 in words is "forty-two million, one hundred eighty-six thousand, five hundred thirteen".