212201440 has 48 divisors (see below), whose sum is σ = 546905520. Its totient is φ = 77163520.

The previous prime is 212201419. The next prime is 212201467. The reversal of 212201440 is 44102212.

It is a super-2 number, since 2×212201440² = 90058902276147200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58525 + ... + 62044.

It is an arithmetic number, because the mean of its divisors is an integer number (11393865).

Almost surely, 2^212201440 is an apocalyptic number.

212201440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212201440 is an abundant number, since it is smaller than the sum of its proper divisors (334704080).

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

212201440 is a wasteful number, since it uses less digits than its factorization.

212201440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120595 (or 120587 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 212201440 is about 14567.1356141144. The cubic root of 212201440 is about 596.4619933360.

Adding to 212201440 its reverse (44102212), we get a palindrome (256303652).

The spelling of 212201440 in words is "two hundred twelve million, two hundred one thousand, four hundred forty".