1222355540 has 24 divisors (see below), whose sum is σ = 2933653632. Its totient is φ = 419093280.

The previous prime is 1222355531. The next prime is 1222355549. The reversal of 1222355540 is 455532221.

It is an interprime number because it is at equal distance from previous prime (1222355531) and next prime (1222355549).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222355549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4365416 + ... + 4365695.

It is an arithmetic number, because the mean of its divisors is an integer number (122235568).

Almost surely, 2^1222355540 is an apocalyptic number.

1222355540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222355540 is an abundant number, since it is smaller than the sum of its proper divisors (1711298092).

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

1222355540 is a wasteful number, since it uses less digits than its factorization.

1222355540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8731127 (or 8731125 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 1222355540 is about 34962.2015897169. The cubic root of 1222355540 is about 1069.2169832533.

Adding to 1222355540 its reverse (455532221), we get a palindrome (1677887761).

The spelling of 1222355540 in words is "one billion, two hundred twenty-two million, three hundred fifty-five thousand, five hundred forty".