214900781 has 2 divisors, whose sum is σ = 214900782. Its totient is φ = 214900780.

The previous prime is 214900771. The next prime is 214900783. The reversal of 214900781 is 187009412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181144681 + 33756100 = 13459^2 + 5810^2 .

It is a cyclic number.

It is not a de Polignac number, because 214900781 - 2⁶ = 214900717 is a prime.

It is a super-2 number, since 2×214900781² = 92364691348819922, which contains 22 as substring.

Together with 214900783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (214900783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107450390 + 107450391.

It is an arithmetic number, because the mean of its divisors is an integer number (107450391).

Almost surely, 2^214900781 is an apocalyptic number.

It is an amenable number.

214900781 is a deficient number, since it is larger than the sum of its proper divisors (1).

214900781 is an equidigital number, since it uses as much as digits as its factorization.

214900781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 214900781 is about 14659.4945683676. The cubic root of 214900781 is about 598.9804732194.

The spelling of 214900781 in words is "two hundred fourteen million, nine hundred thousand, seven hundred eighty-one".