442513403 has 4 divisors (see below), whose sum is σ = 442794528. Its totient is φ = 442232280.

The previous prime is 442513397. The next prime is 442513411. The reversal of 442513403 is 304315244.

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 442513403 - 2²⁶ = 375404539 is a prime.

It is a super-2 number, since 2×442513403² = 391636223669280818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442513103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138188 + ... + 141353.

It is an arithmetic number, because the mean of its divisors is an integer number (110698632).

Almost surely, 2^442513403 is an apocalyptic number.

442513403 is a deficient number, since it is larger than the sum of its proper divisors (281125).

442513403 is a wasteful number, since it uses less digits than its factorization.

442513403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281124.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 442513403 is about 21036.0025432590. The cubic root of 442513403 is about 762.0359784658.

Adding to 442513403 its reverse (304315244), we get a palindrome (746828647).

The spelling of 442513403 in words is "four hundred forty-two million, five hundred thirteen thousand, four hundred three".