212473556 has 6 divisors (see below), whose sum is σ = 371828730. Its totient is φ = 106236776.

The previous prime is 212473543. The next prime is 212473559. The reversal of 212473556 is 655374212.

It can be written as a sum of positive squares in only one way, i.e., 208802500 + 3671056 = 14450^2 + 1916^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212473559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26559191 + ... + 26559198.

It is an arithmetic number, because the mean of its divisors is an integer number (61971455).

Almost surely, 2^212473556 is an apocalyptic number.

It is an amenable number.

212473556 is a deficient number, since it is larger than the sum of its proper divisors (159355174).

212473556 is a wasteful number, since it uses less digits than its factorization.

212473556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53118393 (or 53118391 counting only the distinct ones).

The product of its digits is 50400, while the sum is 35.

The square root of 212473556 is about 14576.4726871764. The cubic root of 212473556 is about 596.7168416274.

The spelling of 212473556 in words is "two hundred twelve million, four hundred seventy-three thousand, five hundred fifty-six".