212556550605 has 16 divisors (see below), whose sum is σ = 388674835584. Its totient is φ = 97168708800.

The previous prime is 212556550579. The next prime is 212556550631. The reversal of 212556550605 is 506055655212.

It is an interprime number because it is at equal distance from previous prime (212556550579) and next prime (212556550631).

It is not a de Polignac number, because 212556550605 - 2⁷ = 212556550477 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1012173946 + ... + 1012174155.

It is an arithmetic number, because the mean of its divisors is an integer number (24292177224).

Almost surely, 2^212556550605 is an apocalyptic number.

It is an amenable number.

212556550605 is a deficient number, since it is larger than the sum of its proper divisors (176118284979).

212556550605 is a wasteful number, since it uses less digits than its factorization.

212556550605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024348116.

The product of its (nonzero) digits is 450000, while the sum is 42.

The spelling of 212556550605 in words is "two hundred twelve billion, five hundred fifty-six million, five hundred fifty thousand, six hundred five".