201213144 has 96 divisors (see below), whose sum is σ = 597542400. Its totient is φ = 60661440.

The previous prime is 201213137. The next prime is 201213151. The reversal of 201213144 is 441312102.

It is an interprime number because it is at equal distance from previous prime (201213137) and next prime (201213151).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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, 188757 + ... + 189819.

It is an arithmetic number, because the mean of its divisors is an integer number (6224400).

Almost surely, 2^201213144 is an apocalyptic number.

201213144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201213144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298771200).

201213144 is an abundant number, since it is smaller than the sum of its proper divisors (396329256).

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

201213144 is a wasteful number, since it uses less digits than its factorization.

201213144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325 (or 1318 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 201213144 is about 14184.9618963182. The cubic root of 201213144 is about 585.9835831190.

Adding to 201213144 its reverse (441312102), we get a palindrome (642525246).

The spelling of 201213144 in words is "two hundred one million, two hundred thirteen thousand, one hundred forty-four".