2155615426223 has 4 divisors (see below), whose sum is σ = 2463560487120. Its totient is φ = 1847670365328.

The previous prime is 2155615426207. The next prime is 2155615426231. The reversal of 2155615426223 is 3226245165512.

It is a happy number.

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 2155615426223 - 2⁴ = 2155615426207 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 (2155615422223) 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, 153972530438 + ... + 153972530451.

It is an arithmetic number, because the mean of its divisors is an integer number (615890121780).

Almost surely, 2^{2155615426223} is an apocalyptic number.

2155615426223 is a deficient number, since it is larger than the sum of its proper divisors (307945060897).

2155615426223 is an equidigital number, since it uses as much as digits as its factorization.

2155615426223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307945060896.

The product of its digits is 864000, while the sum is 44.

The spelling of 2155615426223 in words is "two trillion, one hundred fifty-five billion, six hundred fifteen million, four hundred twenty-six thousand, two hundred twenty-three".