206211391534 has 4 divisors (see below), whose sum is σ = 309317087304. Its totient is φ = 103105695766.

The previous prime is 206211391493. The next prime is 206211391553. The reversal of 206211391534 is 435193112602.

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

It is a junction number, because it is equal to n+sod(n) for n = 206211391493 and 206211391502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51552847882 + ... + 51552847885.

It is an arithmetic number, because the mean of its divisors is an integer number (77329271826).

Almost surely, 2^206211391534 is an apocalyptic number.

206211391534 is a deficient number, since it is larger than the sum of its proper divisors (103105695770).

206211391534 is a wasteful number, since it uses less digits than its factorization.

206211391534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103105695769.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 206211391534 in words is "two hundred six billion, two hundred eleven million, three hundred ninety-one thousand, five hundred thirty-four".