212225651 has 6 divisors (see below), whose sum is σ = 233272956. Its totient is φ = 192932300.

The previous prime is 212225627. The next prime is 212225677. The reversal of 212225651 is 156522212.

It is not a de Polignac number, because 212225651 - 2¹⁴ = 212209267 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 212225651.

It is not an unprimeable number, because it can be changed into a prime (212225551) 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, 876845 + ... + 877086.

It is an arithmetic number, because the mean of its divisors is an integer number (38878826).

Almost surely, 2^212225651 is an apocalyptic number.

212225651 is a deficient number, since it is larger than the sum of its proper divisors (21047305).

212225651 is a wasteful number, since it uses less digits than its factorization.

212225651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753953 (or 1753942 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 212225651 is about 14567.9666048491. The cubic root of 212225651 is about 596.4846768015.

Adding to 212225651 its reverse (156522212), we get a palindrome (368747863).

The spelling of 212225651 in words is "two hundred twelve million, two hundred twenty-five thousand, six hundred fifty-one".