442254015421 has 4 divisors (see below), whose sum is σ = 442260315612. Its totient is φ = 442247715232.

The previous prime is 442254015407. The next prime is 442254015431. The reversal of 442254015421 is 124510452244.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9830722500 + 432423292921 = 99150^2 + 657589^2 .

It is a cyclic number.

It is not a de Polignac number, because 442254015421 - 2⁷ = 442254015293 is a prime.

It is a super-2 number, since 2×442254015421² (a number of 24 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 (442254015431) 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, 3043600 + ... + 3185593.

It is an arithmetic number, because the mean of its divisors is an integer number (110565078903).

Almost surely, 2^442254015421 is an apocalyptic number.

It is an amenable number.

442254015421 is a deficient number, since it is larger than the sum of its proper divisors (6300191).

442254015421 is an equidigital number, since it uses as much as digits as its factorization.

442254015421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6300190.

The product of its (nonzero) digits is 51200, while the sum is 34.

Adding to 442254015421 its reverse (124510452244), we get a palindrome (566764467665).

The spelling of 442254015421 in words is "four hundred forty-two billion, two hundred fifty-four million, fifteen thousand, four hundred twenty-one".