51552221507 has 2 divisors, whose sum is σ = 51552221508. Its totient is φ = 51552221506.

The previous prime is 51552221417. The next prime is 51552221509. The reversal of 51552221507 is 70512225515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51552221507 - 2¹⁰ = 51552220483 is a prime.

Together with 51552221509, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51552221509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25776110753 + 25776110754.

It is an arithmetic number, because the mean of its divisors is an integer number (25776110754).

Almost surely, 2^51552221507 is an apocalyptic number.

51552221507 is a deficient number, since it is larger than the sum of its proper divisors (1).

51552221507 is an equidigital number, since it uses as much as digits as its factorization.

51552221507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35000, while the sum is 35.

The spelling of 51552221507 in words is "fifty-one billion, five hundred fifty-two million, two hundred twenty-one thousand, five hundred seven".