211655542430 has 16 divisors (see below), whose sum is σ = 384752057184. Its totient is φ = 83823976800.

The previous prime is 211655542421. The next prime is 211655542457. The reversal of 211655542430 is 34245556112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104778962 + ... + 104780981.

It is an arithmetic number, because the mean of its divisors is an integer number (24047003574).

Almost surely, 2^211655542430 is an apocalyptic number.

211655542430 is a deficient number, since it is larger than the sum of its proper divisors (173096514754).

211655542430 is a wasteful number, since it uses less digits than its factorization.

211655542430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209560051.

The product of its (nonzero) digits is 144000, while the sum is 38.

The spelling of 211655542430 in words is "two hundred eleven billion, six hundred fifty-five million, five hundred forty-two thousand, four hundred thirty".