42142470031 has 4 divisors (see below), whose sum is σ = 42360824992. Its totient is φ = 41924115072.

The previous prime is 42142470023. The next prime is 42142470101. The reversal of 42142470031 is 13007424124.

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 42142470031 - 2³ = 42142470023 is a prime.

It is a super-2 number, since 2×42142470031² (a number of 22 digits) 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 (42142470731) 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, 109177191 + ... + 109177576.

It is an arithmetic number, because the mean of its divisors is an integer number (10590206248).

Almost surely, 2^42142470031 is an apocalyptic number.

42142470031 is a deficient number, since it is larger than the sum of its proper divisors (218354961).

42142470031 is a wasteful number, since it uses less digits than its factorization.

42142470031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218354960.

The product of its (nonzero) digits is 5376, while the sum is 28.

Adding to 42142470031 its reverse (13007424124), we get a palindrome (55149894155).

The spelling of 42142470031 in words is "forty-two billion, one hundred forty-two million, four hundred seventy thousand, thirty-one".