445252231 has 4 divisors (see below), whose sum is σ = 446702872. Its totient is φ = 443801592.

The previous prime is 445252189. The next prime is 445252259. The reversal of 445252231 is 132252544.

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 445252231 - 2¹³ = 445244039 is a prime.

It is a super-2 number, since 2×445252231² = 396499098420954722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 445252231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445252261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724860 + ... + 725473.

It is an arithmetic number, because the mean of its divisors is an integer number (111675718).

Almost surely, 2^445252231 is an apocalyptic number.

445252231 is a deficient number, since it is larger than the sum of its proper divisors (1450641).

445252231 is a wasteful number, since it uses less digits than its factorization.

445252231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450640.

The product of its digits is 9600, while the sum is 28.

The square root of 445252231 is about 21101.0007108668. Note that the first 3 decimals coincide. The cubic root of 445252231 is about 763.6048909334.

The spelling of 445252231 in words is "four hundred forty-five million, two hundred fifty-two thousand, two hundred thirty-one".