210645453325 has 6 divisors (see below), whose sum is σ = 261200362154. Its totient is φ = 168516362640.

The previous prime is 210645453259. The next prime is 210645453329. The reversal of 210645453325 is 523354546012.

It can be written as a sum of positive squares in 3 ways, for example, as 48541783684 + 162103669641 = 220322^2 + 402621^2 .

It is not a de Polignac number, because 210645453325 - 2⁷ = 210645453197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210645453329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4212909042 + ... + 4212909091.

Almost surely, 2^210645453325 is an apocalyptic number.

210645453325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

210645453325 is a deficient number, since it is larger than the sum of its proper divisors (50554908829).

210645453325 is an equidigital number, since it uses as much as digits as its factorization.

210645453325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8425818143 (or 8425818138 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 40.

Adding to 210645453325 its reverse (523354546012), we get a palindrome (733999999337).

The spelling of 210645453325 in words is "two hundred ten billion, six hundred forty-five million, four hundred fifty-three thousand, three hundred twenty-five".