261215333206 has 8 divisors (see below), whose sum is σ = 391835075544. Its totient is φ = 130603641360.

The previous prime is 261215333147. The next prime is 261215333231. The reversal of 261215333206 is 602333512162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1930840 + ... + 2061691.

It is an arithmetic number, because the mean of its divisors is an integer number (48979384443).

Almost surely, 2^261215333206 is an apocalyptic number.

261215333206 is a deficient number, since it is larger than the sum of its proper divisors (130619742338).

261215333206 is a wasteful number, since it uses less digits than its factorization.

261215333206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4025246.

The product of its (nonzero) digits is 38880, while the sum is 34.

Adding to 261215333206 its reverse (602333512162), we get a palindrome (863548845368).

The spelling of 261215333206 in words is "two hundred sixty-one billion, two hundred fifteen million, three hundred thirty-three thousand, two hundred six".