851241018 has 32 divisors (see below), whose sum is σ = 1751652864. Its totient is φ = 275579712.

The previous prime is 851240993. The next prime is 851241019. The reversal of 851241018 is 810142158.

It is a happy number.

It is a super-2 number, since 2×851241018² = 1449222541451352648, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (851241019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131596 + ... + 137912.

It is an arithmetic number, because the mean of its divisors is an integer number (54739152).

Almost surely, 2^851241018 is an apocalyptic number.

851241018 is an abundant number, since it is smaller than the sum of its proper divisors (900411846).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

851241018 is a wasteful number, since it uses less digits than its factorization.

851241018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6966.

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 851241018 is about 29176.0349944951. The cubic root of 851241018 is about 947.7290235680.

The spelling of 851241018 in words is "eight hundred fifty-one million, two hundred forty-one thousand, eighteen".