201631612 has 24 divisors (see below), whose sum is σ = 434284256. Its totient is φ = 79766208.

The previous prime is 201631607. The next prime is 201631627. The reversal of 201631612 is 216136102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276603 + ... + 277330.

Almost surely, 2^201631612 is an apocalyptic number.

It is an amenable number.

201631612 is an abundant number, since it is smaller than the sum of its proper divisors (232652644).

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

201631612 is a wasteful number, since it uses less digits than its factorization.

201631612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553957 (or 553955 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 201631612 is about 14199.7046448157. The cubic root of 201631612 is about 586.3895300597.

Adding to 201631612 its reverse (216136102), we get a palindrome (417767714).

The spelling of 201631612 in words is "two hundred one million, six hundred thirty-one thousand, six hundred twelve".