44212813 has 2 divisors, whose sum is σ = 44212814. Its totient is φ = 44212812.

The previous prime is 44212811. The next prime is 44212823. The reversal of 44212813 is 31821244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44063044 + 149769 = 6638^2 + 387^2 .

It is a cyclic number.

It is not a de Polignac number, because 44212813 - 2¹ = 44212811 is a prime.

Together with 44212811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44212811) 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 as a sum of consecutive naturals, namely, 22106406 + 22106407.

It is an arithmetic number, because the mean of its divisors is an integer number (22106407).

Almost surely, 2^44212813 is an apocalyptic number.

It is an amenable number.

44212813 is a deficient number, since it is larger than the sum of its proper divisors (1).

44212813 is an equidigital number, since it uses as much as digits as its factorization.

44212813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 25.

The square root of 44212813 is about 6649.2716142447. The cubic root of 44212813 is about 353.6030880761.

The spelling of 44212813 in words is "forty-four million, two hundred twelve thousand, eight hundred thirteen".