201223512 has 192 divisors, whose sum is σ = 649209600. Its totient is φ = 55123200.

The previous prime is 201223487. The next prime is 201223523. The reversal of 201223512 is 215322102.

It is a super-2 number, since 2×201223512² = 80981803563228288, which contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 1992262 + ... + 1992362.

It is an arithmetic number, because the mean of its divisors is an integer number (3381300).

Almost surely, 2^201223512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201223512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324604800).

201223512 is an abundant number, since it is smaller than the sum of its proper divisors (447986088).

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

201223512 is a wasteful number, since it uses less digits than its factorization.

201223512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 201223512 is about 14185.3273490604. The cubic root of 201223512 is about 585.9936476925.

Adding to 201223512 its reverse (215322102), we get a palindrome (416545614).

The spelling of 201223512 in words is "two hundred one million, two hundred twenty-three thousand, five hundred twelve".