44431421 has 4 divisors (see below), whose sum is σ = 47045052. Its totient is φ = 41817792.

The previous prime is 44431351. The next prime is 44431441. The reversal of 44431421 is 12413444.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 35940025 + 8491396 = 5995^2 + 2914^2 .

It is a cyclic number.

It is not a de Polignac number, because 44431421 - 2¹⁸ = 44169277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44431441) 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, 1306790 + ... + 1306823.

It is an arithmetic number, because the mean of its divisors is an integer number (11761263).

Almost surely, 2^44431421 is an apocalyptic number.

It is an amenable number.

44431421 is a deficient number, since it is larger than the sum of its proper divisors (2613631).

44431421 is a wasteful number, since it uses less digits than its factorization.

44431421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2613630.

The product of its digits is 1536, while the sum is 23.

The square root of 44431421 is about 6665.6898367686. The cubic root of 44431421 is about 354.1849209938.

Adding to 44431421 its reverse (12413444), we get a palindrome (56844865).

The spelling of 44431421 in words is "forty-four million, four hundred thirty-one thousand, four hundred twenty-one".