212540305253 has 4 divisors (see below), whose sum is σ = 213727681440. Its totient is φ = 211352929068.

The previous prime is 212540305217. The next prime is 212540305259. The reversal of 212540305253 is 352503045212.

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 212540305253 - 2¹⁴ = 212540288869 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 (212540305259) 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, 593687825 + ... + 593688182.

It is an arithmetic number, because the mean of its divisors is an integer number (53431920360).

Almost surely, 2^212540305253 is an apocalyptic number.

It is an amenable number.

212540305253 is a deficient number, since it is larger than the sum of its proper divisors (1187376187).

212540305253 is a wasteful number, since it uses less digits than its factorization.

212540305253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187376186.

The product of its (nonzero) digits is 36000, while the sum is 32.

The spelling of 212540305253 in words is "two hundred twelve billion, five hundred forty million, three hundred five thousand, two hundred fifty-three".