42210551 has 2 divisors, whose sum is σ = 42210552. Its totient is φ = 42210550.

The previous prime is 42210529. The next prime is 42210593. The reversal of 42210551 is 15501224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42210551 - 2¹⁸ = 41948407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42210521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21105275 + 21105276.

It is an arithmetic number, because the mean of its divisors is an integer number (21105276).

Almost surely, 2^42210551 is an apocalyptic number.

42210551 is a deficient number, since it is larger than the sum of its proper divisors (1).

42210551 is an equidigital number, since it uses as much as digits as its factorization.

42210551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 42210551 is about 6496.9647528673. The cubic root of 42210551 is about 348.1825543925.

Adding to 42210551 its reverse (15501224), we get a palindrome (57711775).

The spelling of 42210551 in words is "forty-two million, two hundred ten thousand, five hundred fifty-one".