211402069 has 2 divisors, whose sum is σ = 211402070. Its totient is φ = 211402068.

The previous prime is 211402033. The next prime is 211402111. The reversal of 211402069 is 960204112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191268900 + 20133169 = 13830^2 + 4487^2 .

It is a cyclic number.

It is not a de Polignac number, because 211402069 - 2⁹ = 211401557 is a prime.

It is a super-2 number, since 2×211402069² = 89381669554961522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211402019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105701034 + 105701035.

It is an arithmetic number, because the mean of its divisors is an integer number (105701035).

Almost surely, 2^211402069 is an apocalyptic number.

It is an amenable number.

211402069 is a deficient number, since it is larger than the sum of its proper divisors (1).

211402069 is an equidigital number, since it uses as much as digits as its factorization.

211402069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 211402069 is about 14539.6722452743. The cubic root of 211402069 is about 595.7120857998.

The spelling of 211402069 in words is "two hundred eleven million, four hundred two thousand, sixty-nine".