211478413 has 2 divisors, whose sum is σ = 211478414. Its totient is φ = 211478412.

The previous prime is 211478401. The next prime is 211478431. The reversal of 211478413 is 314874112.

Together with next prime (211478431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211469764 + 8649 = 14542^2 + 93^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211478413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211478473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105739206 + 105739207.

It is an arithmetic number, because the mean of its divisors is an integer number (105739207).

Almost surely, 2^211478413 is an apocalyptic number.

It is an amenable number.

211478413 is a deficient number, since it is larger than the sum of its proper divisors (1).

211478413 is an equidigital number, since it uses as much as digits as its factorization.

211478413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

The square root of 211478413 is about 14542.2973769621. The cubic root of 211478413 is about 595.7837873527.

The spelling of 211478413 in words is "two hundred eleven million, four hundred seventy-eight thousand, four hundred thirteen".