42822551 has 2 divisors, whose sum is σ = 42822552. Its totient is φ = 42822550.

The previous prime is 42822547. The next prime is 42822557. The reversal of 42822551 is 15522824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42822551 - 2² = 42822547 is a prime.

It is a Chen prime.

It is equal to p_2594540 and since 42822551 and 2594540 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42822557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21411275 + 21411276.

It is an arithmetic number, because the mean of its divisors is an integer number (21411276).

Almost surely, 2^42822551 is an apocalyptic number.

42822551 is a deficient number, since it is larger than the sum of its proper divisors (1).

42822551 is an equidigital number, since it uses as much as digits as its factorization.

42822551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6400, while the sum is 29.

The square root of 42822551 is about 6543.8941770172. The cubic root of 42822551 is about 349.8572233973.

The spelling of 42822551 in words is "forty-two million, eight hundred twenty-two thousand, five hundred fifty-one".