51122455487 has 2 divisors, whose sum is σ = 51122455488. Its totient is φ = 51122455486.

The previous prime is 51122455451. The next prime is 51122455529. The reversal of 51122455487 is 78455422115.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51122455487 - 2¹⁶ = 51122389951 is a prime.

It is a super-2 number, since 2×51122455487² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51122458487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25561227743 + 25561227744.

It is an arithmetic number, because the mean of its divisors is an integer number (25561227744).

Almost surely, 2^51122455487 is an apocalyptic number.

51122455487 is a deficient number, since it is larger than the sum of its proper divisors (1).

51122455487 is an equidigital number, since it uses as much as digits as its factorization.

51122455487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 448000, while the sum is 44.

The spelling of 51122455487 in words is "fifty-one billion, one hundred twenty-two million, four hundred fifty-five thousand, four hundred eighty-seven".