210811042 has 16 divisors (see below), whose sum is σ = 358464960. Its totient is φ = 92176272.

The previous prime is 210811037. The next prime is 210811049. The reversal of 210811042 is 240118012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (210811049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212878 + ... + 213865.

It is an arithmetic number, because the mean of its divisors is an integer number (22404060).

Almost surely, 2^210811042 is an apocalyptic number.

210811042 is a deficient number, since it is larger than the sum of its proper divisors (147653918).

210811042 is a wasteful number, since it uses less digits than its factorization.

210811042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426777.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 210811042 is about 14519.3333869018. Note that the first 4 decimals coincide. The cubic root of 210811042 is about 595.1564139308.

Adding to 210811042 its reverse (240118012), we get a palindrome (450929054).

The spelling of 210811042 in words is "two hundred ten million, eight hundred eleven thousand, forty-two".