442400051 has 2 divisors, whose sum is σ = 442400052. Its totient is φ = 442400050.

The previous prime is 442400041. The next prime is 442400081. The reversal of 442400051 is 150004244.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442400051 - 2⁶ = 442399987 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 442399996 and 442400032.

It is not a weakly prime, because it can be changed into another prime (442400011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221200025 + 221200026.

It is an arithmetic number, because the mean of its divisors is an integer number (221200026).

Almost surely, 2^442400051 is an apocalyptic number.

442400051 is a deficient number, since it is larger than the sum of its proper divisors (1).

442400051 is an equidigital number, since it uses as much as digits as its factorization.

442400051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 442400051 is about 21033.3081325787. The cubic root of 442400051 is about 761.9709064792.

Adding to 442400051 its reverse (150004244), we get a palindrome (592404295).

The spelling of 442400051 in words is "four hundred forty-two million, four hundred thousand, fifty-one".