42111431 has 8 divisors (see below), whose sum is σ = 44666640. Its totient is φ = 39564928.

The previous prime is 42111409. The next prime is 42111473. The reversal of 42111431 is 13411124.

It is a happy number.

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 42111431 - 2²² = 37917127 is a prime.

It is a super-2 number, since 2×42111431² = 3546745241735522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42111401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9680 + ... + 13338.

It is an arithmetic number, because the mean of its divisors is an integer number (5583330).

Almost surely, 2^42111431 is an apocalyptic number.

42111431 is a deficient number, since it is larger than the sum of its proper divisors (2555209).

42111431 is a wasteful number, since it uses less digits than its factorization.

42111431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4353.

The product of its digits is 96, while the sum is 17.

The square root of 42111431 is about 6489.3320919799. The cubic root of 42111431 is about 347.9098034399.

Adding to 42111431 its reverse (13411124), we get a palindrome (55522555).

The spelling of 42111431 in words is "forty-two million, one hundred eleven thousand, four hundred thirty-one".