42131999407 has 4 divisors (see below), whose sum is σ = 44349473080. Its totient is φ = 39914525736.

The previous prime is 42131999389. The next prime is 42131999411. The reversal of 42131999407 is 70499913124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42131999407 - 2¹⁹ = 42131475119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42131919407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1108736808 + ... + 1108736845.

It is an arithmetic number, because the mean of its divisors is an integer number (11087368270).

Almost surely, 2^42131999407 is an apocalyptic number.

42131999407 is a deficient number, since it is larger than the sum of its proper divisors (2217473673).

42131999407 is a wasteful number, since it uses less digits than its factorization.

42131999407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217473672.

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 42131999407 in words is "forty-two billion, one hundred thirty-one million, nine hundred ninety-nine thousand, four hundred seven".