445401431 has 2 divisors, whose sum is σ = 445401432. Its totient is φ = 445401430.

The previous prime is 445401421. The next prime is 445401487. The reversal of 445401431 is 134104544.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 445401431 - 2⁶ = 445401367 is a prime.

It is a super-2 number, since 2×445401431² = 396764869473695522, which contains 22 as substring.

It is a Chen prime.

It is equal to p_23622083 and since 445401431 and 23622083 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 445401431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445401421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222700715 + 222700716.

It is an arithmetic number, because the mean of its divisors is an integer number (222700716).

Almost surely, 2^445401431 is an apocalyptic number.

445401431 is a deficient number, since it is larger than the sum of its proper divisors (1).

445401431 is an equidigital number, since it uses as much as digits as its factorization.

445401431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 445401431 is about 21104.5357920993. The cubic root of 445401431 is about 763.6901737751.

Adding to 445401431 its reverse (134104544), we get a palindrome (579505975).

The spelling of 445401431 in words is "four hundred forty-five million, four hundred one thousand, four hundred thirty-one".