51532823515 has 4 divisors (see below), whose sum is σ = 61839388224. Its totient is φ = 41226258808.

The previous prime is 51532823483. The next prime is 51532823543.

It is a happy number.

51532823515 is nontrivially palindromic in base 10.

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 51532823515 - 2⁵ = 51532823483 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5153282347 + ... + 5153282356.

It is an arithmetic number, because the mean of its divisors is an integer number (15459847056).

Almost surely, 2^51532823515 is an apocalyptic number.

51532823515 is a deficient number, since it is larger than the sum of its proper divisors (10306564709).

51532823515 is a wasteful number, since it uses less digits than its factorization.

51532823515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10306564708.

The product of its digits is 180000, while the sum is 40.

The spelling of 51532823515 in words is "fifty-one billion, five hundred thirty-two million, eight hundred twenty-three thousand, five hundred fifteen".