44220551 has 2 divisors, whose sum is σ = 44220552. Its totient is φ = 44220550.

The previous prime is 44220529. The next prime is 44220571. The reversal of 44220551 is 15502244.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 44220551 - 2²² = 40026247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44220521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22110275 + 22110276.

It is an arithmetic number, because the mean of its divisors is an integer number (22110276).

Almost surely, 2^44220551 is an apocalyptic number.

44220551 is a deficient number, since it is larger than the sum of its proper divisors (1).

44220551 is an equidigital number, since it uses as much as digits as its factorization.

44220551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 44220551 is about 6649.8534570320. The cubic root of 44220551 is about 353.6237157396.

Adding to 44220551 its reverse (15502244), we get a palindrome (59722795).

The spelling of 44220551 in words is "forty-four million, two hundred twenty thousand, five hundred fifty-one".