212047549 has 6 divisors (see below), whose sum is σ = 246667614. Its totient is φ = 181755000.

The previous prime is 212047547. The next prime is 212047607. The reversal of 212047549 is 945740212.

It can be written as a sum of positive squares in only one way, i.e., 137311524 + 74736025 = 11718^2 + 8645^2 .

It is not a de Polignac number, because 212047549 - 2¹ = 212047547 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 (212047547) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2163702 + ... + 2163799.

It is an arithmetic number, because the mean of its divisors is an integer number (41111269).

Almost surely, 2^212047549 is an apocalyptic number.

It is an amenable number.

212047549 is a deficient number, since it is larger than the sum of its proper divisors (34620065).

212047549 is an equidigital number, since it uses as much as digits as its factorization.

212047549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4327515 (or 4327508 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 212047549 is about 14561.8525263786. The cubic root of 212047549 is about 596.3177713636.

The spelling of 212047549 in words is "two hundred twelve million, forty-seven thousand, five hundred forty-nine".