215370000851 has 4 divisors (see below), whose sum is σ = 215449977552. Its totient is φ = 215290024152.

The previous prime is 215370000847. The next prime is 215370000869. The reversal of 215370000851 is 158000073512.

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

It is a cyclic number.

It is not a de Polignac number, because 215370000851 - 2² = 215370000847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215370003851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39984311 + ... + 39989696.

It is an arithmetic number, because the mean of its divisors is an integer number (53862494388).

Almost surely, 2^215370000851 is an apocalyptic number.

215370000851 is a deficient number, since it is larger than the sum of its proper divisors (79976701).

215370000851 is an equidigital number, since it uses as much as digits as its factorization.

215370000851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79976700.

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 215370000851 in words is "two hundred fifteen billion, three hundred seventy million, eight hundred fifty-one", and thus it is an aban number.