51355002051 has 28 divisors (see below), whose sum is σ = 77020168680. Its totient is φ = 34226491680.

The previous prime is 51355001959. The next prime is 51355002077. The reversal of 51355002051 is 15020055315.

51355002051 is a `hidden beast` number, since 5 + 135 + 500 + 20 + 5 + 1 = 666.

It is not a de Polignac number, because 51355002051 - 2¹⁴ = 51354985667 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51355002091) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3061455 + ... + 3078183.

It is an arithmetic number, because the mean of its divisors is an integer number (2750720310).

Almost surely, 2^51355002051 is an apocalyptic number.

51355002051 is a deficient number, since it is larger than the sum of its proper divisors (25665166629).

51355002051 is an equidigital number, since it uses as much as digits as its factorization.

51355002051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20958 (or 20943 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

Adding to 51355002051 its reverse (15020055315), we get a palindrome (66375057366).

The spelling of 51355002051 in words is "fifty-one billion, three hundred fifty-five million, two thousand, fifty-one".