53215815819 has 12 divisors (see below), whose sum is σ = 75373728824. Its totient is φ = 33390315264.

The previous prime is 53215815791. The next prime is 53215815827. The reversal of 53215815819 is 91851851235.

53215815819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53215815819 - 2⁹ = 53215815307 is a prime.

It is a super-2 number, since 2×53215815819² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53215810819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30688762 + ... + 30690495.

Almost surely, 2^53215815819 is an apocalyptic number.

53215815819 is a deficient number, since it is larger than the sum of its proper divisors (22157913005).

53215815819 is a wasteful number, since it uses less digits than its factorization.

53215815819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61379294 (or 61379277 counting only the distinct ones).

The product of its digits is 432000, while the sum is 48.

The spelling of 53215815819 in words is "fifty-three billion, two hundred fifteen million, eight hundred fifteen thousand, eight hundred nineteen".