42312431 has 12 divisors (see below), whose sum is σ = 49330080. Its totient is φ = 36187200.

The previous prime is 42312419. The next prime is 42312437. The reversal of 42312431 is 13421324.

It is not a de Polignac number, because 42312431 - 2⁶ = 42312367 is a prime.

It is a super-2 number, since 2×42312431² = 3580683634259522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42312437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34631 + ... + 35831.

It is an arithmetic number, because the mean of its divisors is an integer number (4110840).

Almost surely, 2^42312431 is an apocalyptic number.

42312431 is a deficient number, since it is larger than the sum of its proper divisors (7017649).

42312431 is a wasteful number, since it uses less digits than its factorization.

42312431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1934 (or 1927 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 42312431 is about 6504.8006118558. The cubic root of 42312431 is about 348.4624554817.

Adding to 42312431 its reverse (13421324), we get a palindrome (55733755).

The spelling of 42312431 in words is "forty-two million, three hundred twelve thousand, four hundred thirty-one".