212509616453 has 4 divisors (see below), whose sum is σ = 212801927520. Its totient is φ = 212217305388.

The previous prime is 212509616437. The next prime is 212509616537. The reversal of 212509616453 is 354616905212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212509616453 - 2⁴ = 212509616437 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 (212509612453) 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, 146154443 + ... + 146155896.

It is an arithmetic number, because the mean of its divisors is an integer number (53200481880).

Almost surely, 2^212509616453 is an apocalyptic number.

It is an amenable number.

212509616453 is a deficient number, since it is larger than the sum of its proper divisors (292311067).

212509616453 is an equidigital number, since it uses as much as digits as its factorization.

212509616453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292311066.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 212509616453 in words is "two hundred twelve billion, five hundred nine million, six hundred sixteen thousand, four hundred fifty-three".