51545254515 has 16 divisors (see below), whose sum is σ = 87323725728. Its totient is φ = 25873696256.

The previous prime is 51545254513. The next prime is 51545254517.

It is a happy number.

51545254515 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (51545254513) and next prime (51545254517).

It is a cyclic number.

It is not a de Polignac number, because 51545254515 - 2¹ = 51545254513 is a prime.

It is a super-2 number, since 2×51545254515² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (51545254513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101068872 + ... + 101069381.

It is an arithmetic number, because the mean of its divisors is an integer number (5457732858).

Almost surely, 2^51545254515 is an apocalyptic number.

51545254515 is a deficient number, since it is larger than the sum of its proper divisors (35778471213).

51545254515 is a wasteful number, since it uses less digits than its factorization.

51545254515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202138278.

The product of its digits is 500000, while the sum is 42.

Adding to 51545254515 its product of digits (500000), we get a palindrome (51545754515).

The spelling of 51545254515 in words is "fifty-one billion, five hundred forty-five million, two hundred fifty-four thousand, five hundred fifteen".