215553198343 has 4 divisors (see below), whose sum is σ = 246346512400. Its totient is φ = 184759884288.

The previous prime is 215553198313. The next prime is 215553198353. The reversal of 215553198343 is 343891355512.

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

It is not a de Polignac number, because 215553198343 - 2¹⁷ = 215553067271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215553198313) 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, 15396657018 + ... + 15396657031.

It is an arithmetic number, because the mean of its divisors is an integer number (61586628100).

Almost surely, 2^215553198343 is an apocalyptic number.

215553198343 is a deficient number, since it is larger than the sum of its proper divisors (30793314057).

215553198343 is an equidigital number, since it uses as much as digits as its factorization.

215553198343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30793314056.

The product of its digits is 1944000, while the sum is 49.

The spelling of 215553198343 in words is "two hundred fifteen billion, five hundred fifty-three million, one hundred ninety-eight thousand, three hundred forty-three".