211550055 has 32 divisors (see below), whose sum is σ = 349221888. Its totient is φ = 109296000.

The previous prime is 211550029. The next prime is 211550081. The reversal of 211550055 is 550055112.

It is an interprime number because it is at equal distance from previous prime (211550029) and next prime (211550081).

It is not a de Polignac number, because 211550055 - 2⁶ = 211549991 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69720 + ... + 72690.

It is an arithmetic number, because the mean of its divisors is an integer number (10913184).

Almost surely, 2^211550055 is an apocalyptic number.

211550055 is a deficient number, since it is larger than the sum of its proper divisors (137671833).

211550055 is a wasteful number, since it uses less digits than its factorization.

211550055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3127.

The product of its (nonzero) digits is 1250, while the sum is 24.

The square root of 211550055 is about 14544.7603967889. The cubic root of 211550055 is about 595.8510571393.

The spelling of 211550055 in words is "two hundred eleven million, five hundred fifty thousand, fifty-five".