42011431 has 16 divisors (see below), whose sum is σ = 52565760. Its totient is φ = 32618880.

The previous prime is 42011423. The next prime is 42011441. The reversal of 42011431 is 13411024.

It is not a de Polignac number, because 42011431 - 2³ = 42011423 is a prime.

It is a super-2 number, since 2×42011431² = 3529920669335522, 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 (42011441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25140 + ... + 26758.

It is an arithmetic number, because the mean of its divisors is an integer number (3285360).

Almost surely, 2^42011431 is an apocalyptic number.

42011431 is a deficient number, since it is larger than the sum of its proper divisors (10554329).

42011431 is a wasteful number, since it uses less digits than its factorization.

42011431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 42011431 is about 6481.6225592054. The cubic root of 42011431 is about 347.6341969143.

Adding to 42011431 its reverse (13411024), we get a palindrome (55422455).

The spelling of 42011431 in words is "forty-two million, eleven thousand, four hundred thirty-one".