212873553 has 6 divisors (see below), whose sum is σ = 307484034. Its totient is φ = 141915696.

The previous prime is 212873537. The next prime is 212873561. The reversal of 212873553 is 355378212.

It is a happy number.

212873553 is a `hidden beast` number, since 21 + 2 + 87 + 3 + 553 = 666.

It can be written as a sum of positive squares in only one way, i.e., 163635264 + 49238289 = 12792^2 + 7017^2 .

It is not a de Polignac number, because 212873553 - 2⁴ = 212873537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212873053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11826300 + ... + 11826317.

It is an arithmetic number, because the mean of its divisors is an integer number (51247339).

Almost surely, 2^212873553 is an apocalyptic number.

It is an amenable number.

212873553 is a deficient number, since it is larger than the sum of its proper divisors (94610481).

212873553 is a wasteful number, since it uses less digits than its factorization.

212873553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23652623 (or 23652620 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 212873553 is about 14590.1868733749. The cubic root of 212873553 is about 597.0910612508.

The spelling of 212873553 in words is "two hundred twelve million, eight hundred seventy-three thousand, five hundred fifty-three".