210421044 has 24 divisors (see below), whose sum is σ = 545536320. Its totient is φ = 70140312.

The previous prime is 210421039. The next prime is 210421049. The reversal of 210421044 is 440124012.

It is an interprime number because it is at equal distance from previous prime (210421039) and next prime (210421049).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210421049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 974064 + ... + 974279.

It is an arithmetic number, because the mean of its divisors is an integer number (22730680).

Almost surely, 2^210421044 is an apocalyptic number.

It is an amenable number.

210421044 is an abundant number, since it is smaller than the sum of its proper divisors (335115276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210421044 is a wasteful number, since it uses less digits than its factorization.

210421044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948356 (or 1948348 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 210421044 is about 14505.8968698940. The cubic root of 210421044 is about 594.7891765387.

Adding to 210421044 its reverse (440124012), we get a palindrome (650545056).

The spelling of 210421044 in words is "two hundred ten million, four hundred twenty-one thousand, forty-four".