212020347 has 16 divisors (see below), whose sum is σ = 352449792. Its totient is φ = 110140320.

The previous prime is 212020301. The next prime is 212020349. The reversal of 212020347 is 743020212.

It is not a de Polignac number, because 212020347 - 2¹² = 212016251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (212020349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 458688 + ... + 459149.

It is an arithmetic number, because the mean of its divisors is an integer number (22028112).

Almost surely, 2^212020347 is an apocalyptic number.

212020347 is a deficient number, since it is larger than the sum of its proper divisors (140429445).

212020347 is a wasteful number, since it uses less digits than its factorization.

212020347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917858.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 212020347 is about 14560.9184806454. The cubic root of 212020347 is about 596.2922712187.

Adding to 212020347 its reverse (743020212), we get a palindrome (955040559).

The spelling of 212020347 in words is "two hundred twelve million, twenty thousand, three hundred forty-seven".