851011247 has 8 divisors (see below), whose sum is σ = 891702240. Its totient is φ = 810627840.

The previous prime is 851011241. The next prime is 851011277. The reversal of 851011247 is 742110158.

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 851011247 - 2¹² = 851007151 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 (851011241) 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, 71222 + ... + 82307.

It is an arithmetic number, because the mean of its divisors is an integer number (111462780).

Almost surely, 2^851011247 is an apocalyptic number.

851011247 is a deficient number, since it is larger than the sum of its proper divisors (40690993).

851011247 is a wasteful number, since it uses less digits than its factorization.

851011247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153793.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 851011247 is about 29172.0970620900. The cubic root of 851011247 is about 947.6437440617.

The spelling of 851011247 in words is "eight hundred fifty-one million, eleven thousand, two hundred forty-seven".