211043154552253 has 4 divisors (see below), whose sum is σ = 212136642399868. Its totient is φ = 209949666704640.

The previous prime is 211043154552239. The next prime is 211043154552287. The reversal of 211043154552253 is 352255451340112.

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 127026920266884 + 84016234285369 = 11270622^2 + 9166037^2 .

It is a cyclic number.

It is not a de Polignac number, because 211043154552253 - 2⁴⁵ = 175858782463421 is a prime.

It is a super-2 number, since 2×211043154552253² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211043154552553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546743923518 + ... + 546743923903.

It is an arithmetic number, because the mean of its divisors is an integer number (53034160599967).

Almost surely, 2^{211043154552253} is an apocalyptic number.

It is an amenable number.

211043154552253 is a deficient number, since it is larger than the sum of its proper divisors (1093487847615).

211043154552253 is a wasteful number, since it uses less digits than its factorization.

211043154552253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093487847614.

The product of its (nonzero) digits is 720000, while the sum is 43.

The spelling of 211043154552253 in words is "two hundred eleven trillion, forty-three billion, one hundred fifty-four million, five hundred fifty-two thousand, two hundred fifty-three".