211000023 has 12 divisors (see below), whose sum is σ = 328222440. Its totient is φ = 129846096.

The previous prime is 211000021. The next prime is 211000033. The reversal of 211000023 is 320000112.

It is a happy number.

It is not a de Polignac number, because 211000023 - 2¹ = 211000021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 210999969 and 211000014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211000021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 901593 + ... + 901826.

It is an arithmetic number, because the mean of its divisors is an integer number (27351870).

Almost surely, 2^211000023 is an apocalyptic number.

211000023 is a deficient number, since it is larger than the sum of its proper divisors (117222417).

211000023 is a wasteful number, since it uses less digits than its factorization.

211000023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1803438 (or 1803435 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 211000023 is about 14525.8398380266. The cubic root of 211000023 is about 595.3342029453.

Adding to 211000023 its reverse (320000112), we get a palindrome (531000135).

The spelling of 211000023 in words is "two hundred eleven million, twenty-three", and thus it is an aban number.