201823650 has 252 divisors, whose sum is σ = 660515202. Its totient is φ = 45722880.

The previous prime is 201823649. The next prime is 201823651. The reversal of 201823650 is 56328102.

201823650 is a `hidden beast` number, since 2 + 0 + 1 + 8 + 2 + 3 + 650 = 666.

It is an interprime number because it is at equal distance from previous prime (201823649) and next prime (201823651).

It can be written as a sum of positive squares in 3 ways, for example, as 85766121 + 116057529 = 9261^2 + 10773^2 .

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201823651) by changing a digit.

It is a polite number, since it can be written in 125 ways as a sum of consecutive naturals, for example, 1785994 + ... + 1786106.

Almost surely, 2^201823650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201823650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330257601).

201823650 is an abundant number, since it is smaller than the sum of its proper divisors (458691552).

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

201823650 is a wasteful number, since it uses less digits than its factorization.

201823650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 201823650 is about 14206.4650775624. The cubic root of 201823650 is about 586.5756340473.

It can be divided in two parts, 20182 and 3650, that added together give a palindrome (23832).

The spelling of 201823650 in words is "two hundred one million, eight hundred twenty-three thousand, six hundred fifty".