51052005245 has 4 divisors (see below), whose sum is σ = 61262406300. Its totient is φ = 40841604192.

The previous prime is 51052005233. The next prime is 51052005247. The reversal of 51052005245 is 54250025015.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10608382009 + 40443623236 = 102997^2 + 201106^2 .

It is a cyclic number.

It is not a de Polignac number, because 51052005245 - 2⁶ = 51052005181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51052005247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5105200520 + ... + 5105200529.

It is an arithmetic number, because the mean of its divisors is an integer number (15315601575).

Almost surely, 2^51052005245 is an apocalyptic number.

It is an amenable number.

51052005245 is a deficient number, since it is larger than the sum of its proper divisors (10210401055).

51052005245 is a wasteful number, since it uses less digits than its factorization.

51052005245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10210401054.

The product of its (nonzero) digits is 10000, while the sum is 29.

The spelling of 51052005245 in words is "fifty-one billion, fifty-two million, five thousand, two hundred forty-five".