211263401 has 2 divisors, whose sum is σ = 211263402. Its totient is φ = 211263400.

The previous prime is 211263379. The next prime is 211263407. The reversal of 211263401 is 104362112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125978176 + 85285225 = 11224^2 + 9235^2 .

It is a cyclic number.

It is not a de Polignac number, because 211263401 - 2²² = 207069097 is a prime.

It is not a weakly prime, because it can be changed into another prime (211263407) 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, 105631700 + 105631701.

It is an arithmetic number, because the mean of its divisors is an integer number (105631701).

Almost surely, 2^211263401 is an apocalyptic number.

It is an amenable number.

211263401 is a deficient number, since it is larger than the sum of its proper divisors (1).

211263401 is an equidigital number, since it uses as much as digits as its factorization.

211263401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 211263401 is about 14534.9028548525. The cubic root of 211263401 is about 595.5818059777.

The spelling of 211263401 in words is "two hundred eleven million, two hundred sixty-three thousand, four hundred one".