210052421 has 4 divisors (see below), whose sum is σ = 210090144. Its totient is φ = 210014700.

The previous prime is 210052411. The next prime is 210052439. The reversal of 210052421 is 124250012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210052421 - 2¹⁸ = 209790277 is a prime.

It is a super-2 number, since 2×210052421² = 88244039135922482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210052421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210052411) 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 3 ways as a sum of consecutive naturals, for example, 8675 + ... + 22256.

It is an arithmetic number, because the mean of its divisors is an integer number (52522536).

Almost surely, 2^210052421 is an apocalyptic number.

It is an amenable number.

210052421 is a deficient number, since it is larger than the sum of its proper divisors (37723).

210052421 is an equidigital number, since it uses as much as digits as its factorization.

210052421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37722.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 210052421 is about 14493.1853296644. The cubic root of 210052421 is about 594.4416493096.

The spelling of 210052421 in words is "two hundred ten million, fifty-two thousand, four hundred twenty-one".