42953831 has 4 divisors (see below), whose sum is σ = 43396752. Its totient is φ = 42510912.

The previous prime is 42953809. The next prime is 42953837. The reversal of 42953831 is 13835924.

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

It is a cyclic number.

It is not a de Polignac number, because 42953831 - 2¹⁸ = 42691687 is a prime.

It is a super-2 number, since 2×42953831² = 3690063195153122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42953791 and 42953800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42953837) 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, 221315 + ... + 221508.

It is an arithmetic number, because the mean of its divisors is an integer number (10849188).

Almost surely, 2^42953831 is an apocalyptic number.

42953831 is a deficient number, since it is larger than the sum of its proper divisors (442921).

42953831 is an equidigital number, since it uses as much as digits as its factorization.

42953831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442920.

The product of its digits is 25920, while the sum is 35.

The square root of 42953831 is about 6553.9172255987. The cubic root of 42953831 is about 350.2143747912.

The spelling of 42953831 in words is "forty-two million, nine hundred fifty-three thousand, eight hundred thirty-one".