445145231 has 4 divisors (see below), whose sum is σ = 446664792. Its totient is φ = 443625672.

The previous prime is 445145227. The next prime is 445145249. The reversal of 445145231 is 132541544.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 445145231 - 2² = 445145227 is a prime.

It is a super-2 number, since 2×445145231² = 396308553364086722, 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 = 445145194 and 445145203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445145291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 759341 + ... + 759926.

It is an arithmetic number, because the mean of its divisors is an integer number (111666198).

Almost surely, 2^445145231 is an apocalyptic number.

445145231 is a deficient number, since it is larger than the sum of its proper divisors (1519561).

445145231 is a wasteful number, since it uses less digits than its factorization.

445145231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519560.

The product of its digits is 9600, while the sum is 29.

The square root of 445145231 is about 21098.4651337485. The cubic root of 445145231 is about 763.5437179147.

Adding to 445145231 its reverse (132541544), we get a palindrome (577686775).

The spelling of 445145231 in words is "four hundred forty-five million, one hundred forty-five thousand, two hundred thirty-one".