431446445 has 4 divisors (see below), whose sum is σ = 517735740. Its totient is φ = 345157152.

The previous prime is 431446423. The next prime is 431446453. The reversal of 431446445 is 544644134.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544644134 = 2 ⋅272322067.

It can be written as a sum of positive squares in 2 ways, for example, as 174741961 + 256704484 = 13219^2 + 16022^2 .

It is a cyclic number.

It is not a de Polignac number, because 431446445 - 2¹⁶ = 431380909 is a prime.

It is a super-2 number, since 2×431446445² = 372292069806276050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43144640 + ... + 43144649.

It is an arithmetic number, because the mean of its divisors is an integer number (129433935).

Almost surely, 2^431446445 is an apocalyptic number.

It is an amenable number.

431446445 is a deficient number, since it is larger than the sum of its proper divisors (86289295).

431446445 is an equidigital number, since it uses as much as digits as its factorization.

431446445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86289294.

The product of its digits is 92160, while the sum is 35.

The square root of 431446445 is about 20771.2889585601. The cubic root of 431446445 is about 755.6296050750.

The spelling of 431446445 in words is "four hundred thirty-one million, four hundred forty-six thousand, four hundred forty-five".