215136051647 has 8 divisors (see below), whose sum is σ = 239687361792. Its totient is φ = 191416989400.

The previous prime is 215136051643. The next prime is 215136051649. The reversal of 215136051647 is 746150631512.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 215136051647 - 2² = 215136051643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215136051643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208061429 + ... + 208062462.

It is an arithmetic number, because the mean of its divisors is an integer number (29960920224).

Almost surely, 2^215136051647 is an apocalyptic number.

215136051647 is a deficient number, since it is larger than the sum of its proper divisors (24551310145).

215136051647 is a wasteful number, since it uses less digits than its factorization.

215136051647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416123949.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 215136051647 in words is "two hundred fifteen billion, one hundred thirty-six million, fifty-one thousand, six hundred forty-seven".