211465139 has 2 divisors, whose sum is σ = 211465140. Its totient is φ = 211465138.

The previous prime is 211465127. The next prime is 211465153. The reversal of 211465139 is 931564112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211465139 - 2¹⁶ = 211399603 is a prime.

It is not a weakly prime, because it can be changed into another prime (211465109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105732569 + 105732570.

It is an arithmetic number, because the mean of its divisors is an integer number (105732570).

Almost surely, 2^211465139 is an apocalyptic number.

211465139 is a deficient number, since it is larger than the sum of its proper divisors (1).

211465139 is an equidigital number, since it uses as much as digits as its factorization.

211465139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 32.

The square root of 211465139 is about 14541.8409769877. The cubic root of 211465139 is about 595.7713217786.

The spelling of 211465139 in words is "two hundred eleven million, four hundred sixty-five thousand, one hundred thirty-nine".