42143313 has 4 divisors (see below), whose sum is σ = 56191088. Its totient is φ = 28095540.

The previous prime is 42143281. The next prime is 42143317. The reversal of 42143313 is 31334124.

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 42143313 - 2⁵ = 42143281 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42143313.

It is not an unprimeable number, because it can be changed into a prime (42143317) 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, 7023883 + ... + 7023888.

It is an arithmetic number, because the mean of its divisors is an integer number (14047772).

Almost surely, 2^42143313 is an apocalyptic number.

It is an amenable number.

42143313 is a deficient number, since it is larger than the sum of its proper divisors (14047775).

42143313 is a wasteful number, since it uses less digits than its factorization.

42143313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14047774.

The product of its digits is 864, while the sum is 21.

The square root of 42143313 is about 6491.7881203872. The cubic root of 42143313 is about 347.9975805751.

Adding to 42143313 its reverse (31334124), we get a palindrome (73477437).

It can be divided in two parts, 421 and 43313, that added together give a palindrome (43734).

The spelling of 42143313 in words is "forty-two million, one hundred forty-three thousand, three hundred thirteen".