212625251 has 2 divisors, whose sum is σ = 212625252. Its totient is φ = 212625250.

The previous prime is 212625247. The next prime is 212625277. The reversal of 212625251 is 152526212.

It is an a-pointer prime, because the next prime (212625277) can be obtained adding 212625251 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212625251 - 2² = 212625247 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212625251.

It is not a weakly prime, because it can be changed into another prime (212621251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106312625 + 106312626.

It is an arithmetic number, because the mean of its divisors is an integer number (106312626).

Almost surely, 2^212625251 is an apocalyptic number.

212625251 is a deficient number, since it is larger than the sum of its proper divisors (1).

212625251 is an equidigital number, since it uses as much as digits as its factorization.

212625251 is an odious number, because the sum of its binary digits is odd.

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

The square root of 212625251 is about 14581.6751781131. The cubic root of 212625251 is about 596.8588160447.

The spelling of 212625251 in words is "two hundred twelve million, six hundred twenty-five thousand, two hundred fifty-one".