1222153040 has 20 divisors (see below), whose sum is σ = 2841506004. Its totient is φ = 488861184.

The previous prime is 1222153013. The next prime is 1222153091. The reversal of 1222153040 is 403512221.

It can be written as a sum of positive squares in 2 ways, for example, as 212693056 + 1009459984 = 14584^2 + 31772^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7638377 + ... + 7638536.

Almost surely, 2^1222153040 is an apocalyptic number.

1222153040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222153040 is an abundant number, since it is smaller than the sum of its proper divisors (1619352964).

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

1222153040 is a wasteful number, since it uses less digits than its factorization.

1222153040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15276926 (or 15276920 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1222153040 is about 34959.3054850922. The cubic root of 1222153040 is about 1069.1579364950.

Adding to 1222153040 its reverse (403512221), we get a palindrome (1625665261).

The spelling of 1222153040 in words is "one billion, two hundred twenty-two million, one hundred fifty-three thousand, forty".