211445004231 has 20 divisors (see below), whose sum is σ = 315877657392. Its totient is φ = 140956478208.

The previous prime is 211445004217. The next prime is 211445004233. The reversal of 211445004231 is 132400544112.

211445004231 is a `hidden beast` number, since 2 + 114 + 4 + 500 + 42 + 3 + 1 = 666.

It is not a de Polignac number, because 211445004231 - 2²³ = 211436615623 is a prime.

It is a super-2 number, since 2×211445004231² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 211445004195 and 211445004204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211445004233) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2038630 + ... + 2139836.

Almost surely, 2^211445004231 is an apocalyptic number.

211445004231 is a deficient number, since it is larger than the sum of its proper divisors (104432653161).

211445004231 is a wasteful number, since it uses less digits than its factorization.

211445004231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127012 (or 127003 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 211445004231 its reverse (132400544112), we get a palindrome (343845548343).

The spelling of 211445004231 in words is "two hundred eleven billion, four hundred forty-five million, four thousand, two hundred thirty-one".