51020555419 has 2 divisors, whose sum is σ = 51020555420. Its totient is φ = 51020555418.

The previous prime is 51020555401. The next prime is 51020555449. The reversal of 51020555419 is 91455502015.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51020555419 - 2²³ = 51012166811 is a prime.

It is a super-2 number, since 2×51020555419² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51020555449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25510277709 + 25510277710.

It is an arithmetic number, because the mean of its divisors is an integer number (25510277710).

Almost surely, 2^51020555419 is an apocalyptic number.

51020555419 is a deficient number, since it is larger than the sum of its proper divisors (1).

51020555419 is an equidigital number, since it uses as much as digits as its factorization.

51020555419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45000, while the sum is 37.

The spelling of 51020555419 in words is "fifty-one billion, twenty million, five hundred fifty-five thousand, four hundred nineteen".