42831312 has 40 divisors (see below), whose sum is σ = 111198240. Its totient is φ = 14206080.

The previous prime is 42831307. The next prime is 42831317. The reversal of 42831312 is 21313824.

It is an interprime number because it is at equal distance from previous prime (42831307) and next prime (42831317).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42831317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8014 + ... + 12242.

It is an arithmetic number, because the mean of its divisors is an integer number (2779956).

Almost surely, 2^42831312 is an apocalyptic number.

It is an amenable number.

42831312 is an abundant number, since it is smaller than the sum of its proper divisors (68366928).

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

42831312 is a wasteful number, since it uses less digits than its factorization.

42831312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4451 (or 4445 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 42831312 is about 6544.5635454169. The cubic root of 42831312 is about 349.8810806879.

The spelling of 42831312 in words is "forty-two million, eight hundred thirty-one thousand, three hundred twelve".