211214057 has 2 divisors, whose sum is σ = 211214058. Its totient is φ = 211214056.

The previous prime is 211214053. The next prime is 211214077. The reversal of 211214057 is 750412112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197233936 + 13980121 = 14044^2 + 3739^2 .

It is a cyclic number.

It is not a de Polignac number, because 211214057 - 2² = 211214053 is a prime.

It is a super-2 number, since 2×211214057² = 89222755748798498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211214053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105607028 + 105607029.

It is an arithmetic number, because the mean of its divisors is an integer number (105607029).

Almost surely, 2^211214057 is an apocalyptic number.

It is an amenable number.

211214057 is a deficient number, since it is larger than the sum of its proper divisors (1).

211214057 is an equidigital number, since it uses as much as digits as its factorization.

211214057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 211214057 is about 14533.2053243598. The cubic root of 211214057 is about 595.5354330978.

Adding to 211214057 its reverse (750412112), we get a palindrome (961626169).

The spelling of 211214057 in words is "two hundred eleven million, two hundred fourteen thousand, fifty-seven".