53215847369 has 4 divisors (see below), whose sum is σ = 53220194244. Its totient is φ = 53211500496.

The previous prime is 53215847357. The next prime is 53215847383. The reversal of 53215847369 is 96374851235.

It is a happy number.

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 3570660025 + 49645187344 = 59755^2 + 222812^2 .

It is a cyclic number.

It is not a de Polignac number, because 53215847369 - 2¹⁶ = 53215781833 is a prime.

It is a super-2 number, since 2×53215847369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 53215847369.

It is not an unprimeable number, because it can be changed into a prime (53215847329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2155022 + ... + 2179575.

It is an arithmetic number, because the mean of its divisors is an integer number (13305048561).

Almost surely, 2^53215847369 is an apocalyptic number.

It is an amenable number.

53215847369 is a deficient number, since it is larger than the sum of its proper divisors (4346875).

53215847369 is a wasteful number, since it uses less digits than its factorization.

53215847369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4346874.

The product of its digits is 5443200, while the sum is 53.

The spelling of 53215847369 in words is "fifty-three billion, two hundred fifteen million, eight hundred forty-seven thousand, three hundred sixty-nine".