204155451 has 16 divisors (see below), whose sum is σ = 308889600. Its totient is φ = 133206984.

The previous prime is 204155449. The next prime is 204155453. The reversal of 204155451 is 154551402.

204155451 is a `hidden beast` number, since 20 + 41 + 554 + 51 = 666.

204155451 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 (204155449) and next prime (204155453).

It is not a de Polignac number, because 204155451 - 2¹ = 204155449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (204155453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79171 + ... + 81708.

It is an arithmetic number, because the mean of its divisors is an integer number (19305600).

Almost surely, 2^204155451 is an apocalyptic number.

204155451 is a deficient number, since it is larger than the sum of its proper divisors (104734149).

204155451 is a wasteful number, since it uses less digits than its factorization.

204155451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160935 (or 160929 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 204155451 is about 14288.2976942672. The cubic root of 204155451 is about 588.8260204486.

The spelling of 204155451 in words is "two hundred four million, one hundred fifty-five thousand, four hundred fifty-one".