53215241645 has 4 divisors (see below), whose sum is σ = 63858289980. Its totient is φ = 42572193312.

The previous prime is 53215241633. The next prime is 53215241647. The reversal of 53215241645 is 54614251235.

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 30252688489 + 22962553156 = 173933^2 + 151534^2 .

It is a cyclic number.

It is not a de Polignac number, because 53215241645 - 2¹² = 53215237549 is a prime.

It is a super-3 number, since 3×53215241645³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 53215241599 and 53215241608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53215241647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5321524160 + ... + 5321524169.

It is an arithmetic number, because the mean of its divisors is an integer number (15964572495).

Almost surely, 2^53215241645 is an apocalyptic number.

It is an amenable number.

53215241645 is a deficient number, since it is larger than the sum of its proper divisors (10643048335).

53215241645 is a wasteful number, since it uses less digits than its factorization.

53215241645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10643048334.

The product of its digits is 144000, while the sum is 38.

The spelling of 53215241645 in words is "fifty-three billion, two hundred fifteen million, two hundred forty-one thousand, six hundred forty-five".