212713661 has 8 divisors (see below), whose sum is σ = 219807744. Its totient is φ = 205634160.

The previous prime is 212713621. The next prime is 212713667. The reversal of 212713661 is 166317212.

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

It is not a de Polignac number, because 212713661 - 2¹⁰ = 212712637 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 (212713667) 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, 31556 + ... + 37698.

It is an arithmetic number, because the mean of its divisors is an integer number (27475968).

Almost surely, 2^212713661 is an apocalyptic number.

It is an amenable number.

212713661 is a deficient number, since it is larger than the sum of its proper divisors (7094083).

212713661 is a wasteful number, since it uses less digits than its factorization.

212713661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7291.

The product of its digits is 3024, while the sum is 29.

The square root of 212713661 is about 14584.7064077410. The cubic root of 212713661 is about 596.9415296070.

The spelling of 212713661 in words is "two hundred twelve million, seven hundred thirteen thousand, six hundred sixty-one".