212215461 has 8 divisors (see below), whose sum is σ = 290601504. Its totient is φ = 137653200.

The previous prime is 212215459. The next prime is 212215463. The reversal of 212215461 is 164512212.

It is an interprime number because it is at equal distance from previous prime (212215459) and next prime (212215463).

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

It is not a de Polignac number, because 212215461 - 2¹ = 212215459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212215463) 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 in 7 ways as a sum of consecutive naturals, for example, 955815 + ... + 956036.

It is an arithmetic number, because the mean of its divisors is an integer number (36325188).

Almost surely, 2^212215461 is an apocalyptic number.

It is an amenable number.

212215461 is a deficient number, since it is larger than the sum of its proper divisors (78386043).

212215461 is a wasteful number, since it uses less digits than its factorization.

212215461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911891.

The product of its digits is 960, while the sum is 24.

The square root of 212215461 is about 14567.6168606948. The cubic root of 212215461 is about 596.4751299252.

Adding to 212215461 its reverse (164512212), we get a palindrome (376727673).

The spelling of 212215461 in words is "two hundred twelve million, two hundred fifteen thousand, four hundred sixty-one".