213052611545 has 4 divisors (see below), whose sum is σ = 255663133860. Its totient is φ = 170442089232.

The previous prime is 213052611491. The next prime is 213052611557. The reversal of 213052611545 is 545116250312.

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 63149679616 + 149902931929 = 251296^2 + 387173^2 .

It is a cyclic number.

It is not a de Polignac number, because 213052611545 - 2¹⁰ = 213052610521 is a prime.

It is a super-2 number, since 2×213052611545² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21305261150 + ... + 21305261159.

It is an arithmetic number, because the mean of its divisors is an integer number (63915783465).

Almost surely, 2^213052611545 is an apocalyptic number.

It is an amenable number.

213052611545 is a deficient number, since it is larger than the sum of its proper divisors (42610522315).

213052611545 is an equidigital number, since it uses as much as digits as its factorization.

213052611545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42610522314.

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 213052611545 its reverse (545116250312), we get a palindrome (758168861857).

The spelling of 213052611545 in words is "two hundred thirteen billion, fifty-two million, six hundred eleven thousand, five hundred forty-five".