68552251 has 2 divisors, whose sum is σ = 68552252. Its totient is φ = 68552250.

The previous prime is 68552219. The next prime is 68552261. The reversal of 68552251 is 15225586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68552251 - 2⁵ = 68552219 is a prime.

It is a super-2 number, since 2×68552251² = 9398822234334002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68552261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34276125 + 34276126.

It is an arithmetic number, because the mean of its divisors is an integer number (34276126).

Almost surely, 2^68552251 is an apocalyptic number.

68552251 is a deficient number, since it is larger than the sum of its proper divisors (1).

68552251 is an equidigital number, since it uses as much as digits as its factorization.

68552251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24000, while the sum is 34.

The square root of 68552251 is about 8279.6286752487. The cubic root of 68552251 is about 409.2674824454.

The spelling of 68552251 in words is "sixty-eight million, five hundred fifty-two thousand, two hundred fifty-one".