206819425 has 12 divisors (see below), whose sum is σ = 256975740. Its totient is φ = 165120320.

The previous prime is 206819413. The next prime is 206819441. The reversal of 206819425 is 524918602.

It can be written as a sum of positive squares in 6 ways, for example, as 3243601 + 203575824 = 1801^2 + 14268^2 .

It is not a de Polignac number, because 206819425 - 2¹⁹ = 206295137 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4599 + ... + 20851.

It is an arithmetic number, because the mean of its divisors is an integer number (21414645).

Almost surely, 2^206819425 is an apocalyptic number.

206819425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

206819425 is a deficient number, since it is larger than the sum of its proper divisors (50156315).

206819425 is a wasteful number, since it uses less digits than its factorization.

206819425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16772 (or 16767 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 206819425 is about 14381.2177857092. The cubic root of 206819425 is about 591.3761089608.

The spelling of 206819425 in words is "two hundred six million, eight hundred nineteen thousand, four hundred twenty-five".