215423110550505 has 256 divisors, whose sum is σ = 411429047500800. Its totient is φ = 94875694018560.

The previous prime is 215423110550491. The next prime is 215423110550567. The reversal of 215423110550505 is 505055011324512.

It is not a de Polignac number, because 215423110550505 - 2¹⁶ = 215423110484969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 111444960519 + ... + 111444962451.

It is an arithmetic number, because the mean of its divisors is an integer number (1607144716800).

Almost surely, 2^{215423110550505} is an apocalyptic number.

It is an amenable number.

215423110550505 is a deficient number, since it is larger than the sum of its proper divisors (196005936950295).

215423110550505 is a wasteful number, since it uses less digits than its factorization.

215423110550505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3896.

The product of its (nonzero) digits is 150000, while the sum is 39.

The spelling of 215423110550505 in words is "two hundred fifteen trillion, four hundred twenty-three billion, one hundred ten million, five hundred fifty thousand, five hundred five".