215485197 has 4 divisors (see below), whose sum is σ = 287313600. Its totient is φ = 143656796.

The previous prime is 215485189. The next prime is 215485201. The reversal of 215485197 is 791584512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 215485197 - 2³ = 215485189 is a prime.

It is a super-2 number, since 2×215485197² = 92867740252257618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215485117) 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, 35914197 + ... + 35914202.

It is an arithmetic number, because the mean of its divisors is an integer number (71828400).

Almost surely, 2^215485197 is an apocalyptic number.

It is an amenable number.

215485197 is a deficient number, since it is larger than the sum of its proper divisors (71828403).

215485197 is an equidigital number, since it uses as much as digits as its factorization.

215485197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71828402.

The product of its digits is 100800, while the sum is 42.

The square root of 215485197 is about 14679.4140550636. The cubic root of 215485197 is about 599.5229513637.

The spelling of 215485197 in words is "two hundred fifteen million, four hundred eighty-five thousand, one hundred ninety-seven".