445421231 has 4 divisors (see below), whose sum is σ = 448088592. Its totient is φ = 442753872.

The previous prime is 445421227. The next prime is 445421239. The reversal of 445421231 is 132124544.

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 445421231 - 2² = 445421227 is a prime.

It is a super-2 number, since 2×445421231² = 396800146051110722, 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 445421231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445421239) 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, 1333430 + ... + 1333763.

It is an arithmetic number, because the mean of its divisors is an integer number (112022148).

Almost surely, 2^445421231 is an apocalyptic number.

445421231 is a deficient number, since it is larger than the sum of its proper divisors (2667361).

445421231 is a wasteful number, since it uses less digits than its factorization.

445421231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2667360.

The product of its digits is 3840, while the sum is 26.

The square root of 445421231 is about 21105.0048803595. The cubic root of 445421231 is about 763.7014900397.

Adding to 445421231 its reverse (132124544), we get a palindrome (577545775).

The spelling of 445421231 in words is "four hundred forty-five million, four hundred twenty-one thousand, two hundred thirty-one".