204101010 has 48 divisors (see below), whose sum is σ = 532994904. Its totient is φ = 54187776.

The previous prime is 204100987. The next prime is 204101033. The reversal of 204101010 is 10101402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (204100987) and next prime (204101033).

It can be written as a sum of positive squares in 4 ways, for example, as 171164889 + 32936121 = 13083^2 + 5739^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 204100983 and 204101001.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16104 + ... + 25836.

Almost surely, 2^204101010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204101010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266497452).

204101010 is an abundant number, since it is smaller than the sum of its proper divisors (328893894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204101010 is a wasteful number, since it uses less digits than its factorization.

204101010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9979 (or 9976 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 204101010 is about 14286.3924767591. The cubic root of 204101010 is about 588.7736761409.

Adding to 204101010 its reverse (10101402), we get a palindrome (214202412).

The spelling of 204101010 in words is "two hundred four million, one hundred one thousand, ten".