445345231 has 8 divisors (see below), whose sum is σ = 452336400. Its totient is φ = 438398400.

The previous prime is 445345213. The next prime is 445345247. The reversal of 445345231 is 132543544.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445345231 is a prime.

It is a super-2 number, since 2×445345231² = 396664749548886722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 445345193 and 445345202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445345211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9456 + ... + 31306.

It is an arithmetic number, because the mean of its divisors is an integer number (56542050).

Almost surely, 2^445345231 is an apocalyptic number.

445345231 is a deficient number, since it is larger than the sum of its proper divisors (6991169).

445345231 is a wasteful number, since it uses less digits than its factorization.

445345231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22169.

The product of its digits is 28800, while the sum is 31.

The square root of 445345231 is about 21103.2042827624. The cubic root of 445345231 is about 763.6580520454.

Adding to 445345231 its reverse (132543544), we get a palindrome (577888775).

The spelling of 445345231 in words is "four hundred forty-five million, three hundred forty-five thousand, two hundred thirty-one".