442100431 has 4 divisors (see below), whose sum is σ = 442357272. Its totient is φ = 441843592.

The previous prime is 442100381. The next prime is 442100441. The reversal of 442100431 is 134001244.

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 442100431 - 2²³ = 433711823 is a prime.

It is a super-2 number, since 2×442100431² = 390905582180771522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442100399 and 442100408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442100441) 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, 125821 + ... + 129286.

It is an arithmetic number, because the mean of its divisors is an integer number (110589318).

Almost surely, 2^442100431 is an apocalyptic number.

442100431 is a deficient number, since it is larger than the sum of its proper divisors (256841).

442100431 is a wasteful number, since it uses less digits than its factorization.

442100431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256840.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 442100431 is about 21026.1844137257. The cubic root of 442100431 is about 761.7988500777.

Adding to 442100431 its reverse (134001244), we get a palindrome (576101675).

The spelling of 442100431 in words is "four hundred forty-two million, one hundred thousand, four hundred thirty-one".