211645451253 has 8 divisors (see below), whose sum is σ = 287518349088. Its totient is φ = 138434760464.

The previous prime is 211645451239. The next prime is 211645451341. The reversal of 211645451253 is 352154546112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211645451253 - 2¹⁰ = 211645450229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211645452253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665551575 + ... + 665551892.

It is an arithmetic number, because the mean of its divisors is an integer number (35939793636).

Almost surely, 2^211645451253 is an apocalyptic number.

It is an amenable number.

211645451253 is a deficient number, since it is larger than the sum of its proper divisors (75872897835).

211645451253 is a wasteful number, since it uses less digits than its factorization.

211645451253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331103523.

The product of its digits is 144000, while the sum is 39.

Adding to 211645451253 its reverse (352154546112), we get a palindrome (563799997365).

The spelling of 211645451253 in words is "two hundred eleven billion, six hundred forty-five million, four hundred fifty-one thousand, two hundred fifty-three".