201442420031 has 4 divisors (see below), whose sum is σ = 201444231072. Its totient is φ = 201440608992.

The previous prime is 201442420019. The next prime is 201442420061. The reversal of 201442420031 is 130024244102.

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 201442420031 - 2¹⁰ = 201442419007 is a prime.

It is a super-2 number, since 2×201442420031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201442419979 and 201442420006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201442420061) 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, 726935 + ... + 965048.

It is an arithmetic number, because the mean of its divisors is an integer number (50361057768).

Almost surely, 2^201442420031 is an apocalyptic number.

201442420031 is a deficient number, since it is larger than the sum of its proper divisors (1811041).

201442420031 is a wasteful number, since it uses less digits than its factorization.

201442420031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811040.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 201442420031 its reverse (130024244102), we get a palindrome (331466664133).

The spelling of 201442420031 in words is "two hundred one billion, four hundred forty-two million, four hundred twenty thousand, thirty-one".