52211561 has 2 divisors, whose sum is σ = 52211562. Its totient is φ = 52211560.

The previous prime is 52211557. The next prime is 52211567. The reversal of 52211561 is 16511225.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46717225 + 5494336 = 6835^2 + 2344^2 .

It is a cyclic number.

It is not a de Polignac number, because 52211561 - 2² = 52211557 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (52211567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26105780 + 26105781.

It is an arithmetic number, because the mean of its divisors is an integer number (26105781).

Almost surely, 2^52211561 is an apocalyptic number.

It is an amenable number.

52211561 is a deficient number, since it is larger than the sum of its proper divisors (1).

52211561 is an equidigital number, since it uses as much as digits as its factorization.

52211561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 600, while the sum is 23.

The square root of 52211561 is about 7225.7567769750. The cubic root of 52211561 is about 373.7566190854.

Adding to 52211561 its reverse (16511225), we get a palindrome (68722786).

The spelling of 52211561 in words is "fifty-two million, two hundred eleven thousand, five hundred sixty-one".