211256055 has 24 divisors (see below), whose sum is σ = 368860752. Its totient is φ = 111844224.

The previous prime is 211256053. The next prime is 211256057. The reversal of 211256055 is 550652112.

It is an interprime number because it is at equal distance from previous prime (211256053) and next prime (211256057).

It is not a de Polignac number, because 211256055 - 2¹ = 211256053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211256053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10969 + ... + 23298.

It is an arithmetic number, because the mean of its divisors is an integer number (15369198).

Almost surely, 2^211256055 is an apocalyptic number.

211256055 is a deficient number, since it is larger than the sum of its proper divisors (157604697).

211256055 is a wasteful number, since it uses less digits than its factorization.

211256055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34415 (or 34412 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 211256055 is about 14534.6501505884. The cubic root of 211256055 is about 595.5749027554.

The spelling of 211256055 in words is "two hundred eleven million, two hundred fifty-six thousand, fifty-five".