215228697 has 8 divisors (see below), whose sum is σ = 289758144. Its totient is φ = 142092528.

The previous prime is 215228693. The next prime is 215228759. The reversal of 215228697 is 796822512.

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

It is not a de Polignac number, because 215228697 - 2² = 215228693 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215228693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347958 + ... + 348575.

It is an arithmetic number, because the mean of its divisors is an integer number (36219768).

Almost surely, 2^215228697 is an apocalyptic number.

It is an amenable number.

215228697 is a deficient number, since it is larger than the sum of its proper divisors (74529447).

215228697 is a wasteful number, since it uses less digits than its factorization.

215228697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696639.

The product of its digits is 120960, while the sum is 42.

The square root of 215228697 is about 14670.6747288596. The cubic root of 215228697 is about 599.2849788018.

The spelling of 215228697 in words is "two hundred fifteen million, two hundred twenty-eight thousand, six hundred ninety-seven".