42431431 has 8 divisors (see below), whose sum is σ = 48543264. Its totient is φ = 36332160.

The previous prime is 42431407. The next prime is 42431447. The reversal of 42431431 is 13413424.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42431431 - 2⁵ = 42431399 is a prime.

It is a super-2 number, since 2×42431431² = 3600852673415522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42431461) 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, 5811 + ... + 10891.

It is an arithmetic number, because the mean of its divisors is an integer number (6067908).

Almost surely, 2^42431431 is an apocalyptic number.

42431431 is a deficient number, since it is larger than the sum of its proper divisors (6111833).

42431431 is a wasteful number, since it uses less digits than its factorization.

42431431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6281.

The product of its digits is 1152, while the sum is 22.

The square root of 42431431 is about 6513.9412800546. The cubic root of 42431431 is about 348.7888230740.

Adding to 42431431 its reverse (13413424), we get a palindrome (55844855).

The spelling of 42431431 in words is "forty-two million, four hundred thirty-one thousand, four hundred thirty-one".