42831222 has 32 divisors (see below), whose sum is σ = 98150400. Its totient is φ = 12206208.

The previous prime is 42831209. The next prime is 42831253. The reversal of 42831222 is 22213824.

It is a junction number, because it is equal to n+sod(n) for n = 42831192 and 42831201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19054 + ... + 21182.

It is an arithmetic number, because the mean of its divisors is an integer number (3067200).

Almost surely, 2^42831222 is an apocalyptic number.

42831222 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

42831222 is an abundant number, since it is smaller than the sum of its proper divisors (55319178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42831222 is a wasteful number, since it uses less digits than its factorization.

42831222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620.

The product of its digits is 1536, while the sum is 24.

The square root of 42831222 is about 6544.5566694773. The cubic root of 42831222 is about 349.8808356232.

The spelling of 42831222 in words is "forty-two million, eight hundred thirty-one thousand, two hundred twenty-two".