215653715223743 has 4 divisors (see below), whose sum is σ = 215653957854888. Its totient is φ = 215653472592600.

The previous prime is 215653715223659. The next prime is 215653715223769. The reversal of 215653715223743 is 347322517356512.

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 215653715223743 - 2¹⁶ = 215653715158207 is a prime.

It is a super-3 number, since 3×215653715223743³ (a number of 44 digits) contains 333 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 (215653715223643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119977433 + ... + 121761618.

It is an arithmetic number, because the mean of its divisors is an integer number (53913489463722).

Almost surely, 2^{215653715223743} is an apocalyptic number.

215653715223743 is a deficient number, since it is larger than the sum of its proper divisors (242631145).

215653715223743 is an equidigital number, since it uses as much as digits as its factorization.

215653715223743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242631144.

The product of its digits is 31752000, while the sum is 56.

The spelling of 215653715223743 in words is "two hundred fifteen trillion, six hundred fifty-three billion, seven hundred fifteen million, two hundred twenty-three thousand, seven hundred forty-three".