210404252 has 24 divisors (see below), whose sum is σ = 391596240. Its totient is φ = 98634240.

The previous prime is 210404239. The next prime is 210404261. The reversal of 210404252 is 252404012.

It is a happy number.

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, 6899 + ... + 21642.

It is an arithmetic number, because the mean of its divisors is an integer number (16316510).

Almost surely, 2^210404252 is an apocalyptic number.

It is an amenable number.

210404252 is a deficient number, since it is larger than the sum of its proper divisors (181191988).

210404252 is a wasteful number, since it uses less digits than its factorization.

210404252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28661 (or 28659 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 210404252 is about 14505.3180592499. The cubic root of 210404252 is about 594.7733543482.

Adding to 210404252 its reverse (252404012), we get a palindrome (462808264).

The spelling of 210404252 in words is "two hundred ten million, four hundred four thousand, two hundred fifty-two".