212057923949 has 8 divisors (see below), whose sum is σ = 215542361400. Its totient is φ = 208573747200.

The previous prime is 212057923939. The next prime is 212057923963. The reversal of 212057923949 is 949329750212.

It can be written as a sum of positive squares in 4 ways, for example, as 4120900 + 212053803049 = 2030^2 + 460493^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212057923949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212057923949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212057923919) 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, 2237477 + ... + 2330325.

It is an arithmetic number, because the mean of its divisors is an integer number (26942795175).

Almost surely, 2^212057923949 is an apocalyptic number.

It is an amenable number.

212057923949 is a deficient number, since it is larger than the sum of its proper divisors (3484437451).

212057923949 is an equidigital number, since it uses as much as digits as its factorization.

212057923949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130351.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The spelling of 212057923949 in words is "two hundred twelve billion, fifty-seven million, nine hundred twenty-three thousand, nine hundred forty-nine".