206551438 has 4 divisors (see below), whose sum is σ = 309827160. Its totient is φ = 103275718.

The previous prime is 206551379. The next prime is 206551439. The reversal of 206551438 is 834155602.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206551439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51637858 + ... + 51637861.

It is an arithmetic number, because the mean of its divisors is an integer number (77456790).

Almost surely, 2^206551438 is an apocalyptic number.

206551438 is a deficient number, since it is larger than the sum of its proper divisors (103275722).

206551438 is a wasteful number, since it uses less digits than its factorization.

206551438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103275721.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 206551438 is about 14371.8975086799. The cubic root of 206551438 is about 591.1205726648.

The spelling of 206551438 in words is "two hundred six million, five hundred fifty-one thousand, four hundred thirty-eight".