215198293 has 4 divisors (see below), whose sum is σ = 217209600. Its totient is φ = 213186988.

The previous prime is 215198279. The next prime is 215198297. The reversal of 215198293 is 392891512.

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 215198293 - 2⁵ = 215198261 is a prime.

It is a super-2 number, since 2×215198293² = 92620610620227698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215198297) 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, 1005493 + ... + 1005706.

It is an arithmetic number, because the mean of its divisors is an integer number (54302400).

Almost surely, 2^215198293 is an apocalyptic number.

It is an amenable number.

215198293 is a deficient number, since it is larger than the sum of its proper divisors (2011307).

215198293 is a wasteful number, since it uses less digits than its factorization.

215198293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011306.

The product of its digits is 38880, while the sum is 40.

The square root of 215198293 is about 14669.6384754363. The cubic root of 215198293 is about 599.2567584037.

The spelling of 215198293 in words is "two hundred fifteen million, one hundred ninety-eight thousand, two hundred ninety-three".