1222200540 has 72 divisors (see below), whose sum is σ = 4044379248. Its totient is φ = 296290560.

The previous prime is 1222200439. The next prime is 1222200559. The reversal of 1222200540 is 450022221.

1222200540 is a `hidden beast` number, since 122 + 2 + 2 + 0 + 0 + 540 = 666.

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, 306657 + ... + 310616.

It is an arithmetic number, because the mean of its divisors is an integer number (56171934).

Almost surely, 2^1222200540 is an apocalyptic number.

1222200540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222200540 is an abundant number, since it is smaller than the sum of its proper divisors (2822178708).

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

1222200540 is a wasteful number, since it uses less digits than its factorization.

1222200540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617299 (or 617294 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1222200540 is about 34959.9848398136. The cubic root of 1222200540 is about 1069.1717875547.

Adding to 1222200540 its reverse (450022221), we get a palindrome (1672222761).

The spelling of 1222200540 in words is "one billion, two hundred twenty-two million, two hundred thousand, five hundred forty".