44531821 has 2 divisors, whose sum is σ = 44531822. Its totient is φ = 44531820.

The previous prime is 44531807. The next prime is 44531833. The reversal of 44531821 is 12813544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25704900 + 18826921 = 5070^2 + 4339^2 .

It is a cyclic number.

It is not a de Polignac number, because 44531821 - 2⁷ = 44531693 is a prime.

It is equal to p_2691532 and since 44531821 and 2691532 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 44531821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44531021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22265910 + 22265911.

It is an arithmetic number, because the mean of its divisors is an integer number (22265911).

Almost surely, 2^44531821 is an apocalyptic number.

It is an amenable number.

44531821 is a deficient number, since it is larger than the sum of its proper divisors (1).

44531821 is an equidigital number, since it uses as much as digits as its factorization.

44531821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 28.

The square root of 44531821 is about 6673.2166906223. The cubic root of 44531821 is about 354.4514997211.

The spelling of 44531821 in words is "forty-four million, five hundred thirty-one thousand, eight hundred twenty-one".