210302421 has 8 divisors (see below), whose sum is σ = 320460864. Its totient is φ = 120172800.

The previous prime is 210302399. The next prime is 210302423. The reversal of 210302421 is 124203012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 210302421 - 2¹³ = 210294229 is a prime.

It is a super-2 number, since 2×210302421² = 88454216556922482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 210302421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210302423) 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, 5007180 + ... + 5007221.

It is an arithmetic number, because the mean of its divisors is an integer number (40057608).

Almost surely, 2^210302421 is an apocalyptic number.

210302421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

210302421 is a deficient number, since it is larger than the sum of its proper divisors (110158443).

210302421 is a wasteful number, since it uses less digits than its factorization.

210302421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10014411.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 210302421 is about 14501.8075080315. The cubic root of 210302421 is about 594.6773864856.

Adding to 210302421 its reverse (124203012), we get a palindrome (334505433).

The spelling of 210302421 in words is "two hundred ten million, three hundred two thousand, four hundred twenty-one".