200415421 has 8 divisors (see below), whose sum is σ = 210853944. Its totient is φ = 190241280.

The previous prime is 200415407. The next prime is 200415427. The reversal of 200415421 is 124514002.

It can be written as a sum of positive squares in 4 ways, for example, as 5812921 + 194602500 = 2411^2 + 13950^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 200415421 - 2¹⁵ = 200382653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200415427) 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, 64540 + ... + 67573.

It is an arithmetic number, because the mean of its divisors is an integer number (26356743).

Almost surely, 2^200415421 is an apocalyptic number.

It is an amenable number.

200415421 is a deficient number, since it is larger than the sum of its proper divisors (10438523).

200415421 is a wasteful number, since it uses less digits than its factorization.

200415421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132191.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 200415421 is about 14156.8153551567. The cubic root of 200415421 is about 585.2081670837.

Adding to 200415421 its reverse (124514002), we get a palindrome (324929423).

The spelling of 200415421 in words is "two hundred million, four hundred fifteen thousand, four hundred twenty-one".