445121431 has 2 divisors, whose sum is σ = 445121432. Its totient is φ = 445121430.

The previous prime is 445121399. The next prime is 445121441. The reversal of 445121431 is 134121544.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 445121431 - 2⁵ = 445121399 is a prime.

It is a super-2 number, since 2×445121431² = 396266176670975522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 445121396 and 445121405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445121441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222560715 + 222560716.

It is an arithmetic number, because the mean of its divisors is an integer number (222560716).

Almost surely, 2^445121431 is an apocalyptic number.

445121431 is a deficient number, since it is larger than the sum of its proper divisors (1).

445121431 is an equidigital number, since it uses as much as digits as its factorization.

445121431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 25.

The square root of 445121431 is about 21097.9011041383. The cubic root of 445121431 is about 763.5301098732.

Adding to 445121431 its reverse (134121544), we get a palindrome (579242975).

The spelling of 445121431 in words is "four hundred forty-five million, one hundred twenty-one thousand, four hundred thirty-one".