204152421 has 32 divisors (see below), whose sum is σ = 310087296. Its totient is φ = 118368000.

The previous prime is 204152419. The next prime is 204152423. The reversal of 204152421 is 124251402.

204152421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (204152419) and next prime (204152423).

It is not a de Polignac number, because 204152421 - 2¹ = 204152419 is a prime.

It is a super-2 number, since 2×204152421² = 83356422000322482, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204152423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73111 + ... + 75851.

It is an arithmetic number, because the mean of its divisors is an integer number (9690228).

Almost surely, 2^204152421 is an apocalyptic number.

It is an amenable number.

204152421 is a deficient number, since it is larger than the sum of its proper divisors (105934875).

204152421 is a wasteful number, since it uses less digits than its factorization.

204152421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2853.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 204152421 is about 14288.1916630482. The cubic root of 204152421 is about 588.8231073879.

The spelling of 204152421 in words is "two hundred four million, one hundred fifty-two thousand, four hundred twenty-one".