44551021 has 2 divisors, whose sum is σ = 44551022. Its totient is φ = 44551020.

The previous prime is 44550949. The next prime is 44551043. The reversal of 44551021 is 12015544.

It is an a-pointer prime, because the next prime (44551043) can be obtained adding 44551021 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40182921 + 4368100 = 6339^2 + 2090^2 .

It is a cyclic number.

It is not a de Polignac number, because 44551021 - 2⁹ = 44550509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 44550983 and 44551001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44551081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22275510 + 22275511.

It is an arithmetic number, because the mean of its divisors is an integer number (22275511).

Almost surely, 2^44551021 is an apocalyptic number.

It is an amenable number.

44551021 is a deficient number, since it is larger than the sum of its proper divisors (1).

44551021 is an equidigital number, since it uses as much as digits as its factorization.

44551021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 44551021 is about 6674.6551221767. The cubic root of 44551021 is about 354.5024332694.

Adding to 44551021 its reverse (12015544), we get a palindrome (56566565).

It can be divided in two parts, 4455 and 1021, that added together give a square (5476 = 74²).

The spelling of 44551021 in words is "forty-four million, five hundred fifty-one thousand, twenty-one".