51445214259 has 4 divisors (see below), whose sum is σ = 68593619016. Its totient is φ = 34296809504.

The previous prime is 51445214251. The next prime is 51445214341. The reversal of 51445214259 is 95241254415.

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

It is a cyclic number.

It is not a de Polignac number, because 51445214259 - 2³ = 51445214251 is a prime.

It is a super-2 number, since 2×51445214259² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51445214259.

It is not an unprimeable number, because it can be changed into a prime (51445214251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8574202374 + ... + 8574202379.

It is an arithmetic number, because the mean of its divisors is an integer number (17148404754).

Almost surely, 2^51445214259 is an apocalyptic number.

51445214259 is a deficient number, since it is larger than the sum of its proper divisors (17148404757).

51445214259 is a wasteful number, since it uses less digits than its factorization.

51445214259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17148404756.

The product of its digits is 288000, while the sum is 42.

The spelling of 51445214259 in words is "fifty-one billion, four hundred forty-five million, two hundred fourteen thousand, two hundred fifty-nine".