220515145123 has 16 divisors (see below), whose sum is σ = 271476377536. Its totient is φ = 174426514560.

The previous prime is 220515145021. The next prime is 220515145183. The reversal of 220515145123 is 321541515022.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220515145123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220515145183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15133 + ... + 664273.

It is an arithmetic number, because the mean of its divisors is an integer number (16967273596).

Almost surely, 2^220515145123 is an apocalyptic number.

220515145123 is a deficient number, since it is larger than the sum of its proper divisors (50961232413).

220515145123 is a wasteful number, since it uses less digits than its factorization.

220515145123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652894.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 220515145123 in words is "two hundred twenty billion, five hundred fifteen million, one hundred forty-five thousand, one hundred twenty-three".