1220104553 has 4 divisors (see below), whose sum is σ = 1236818388. Its totient is φ = 1203390720.

The previous prime is 1220104547. The next prime is 1220104577. The reversal of 1220104553 is 3554010221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 331349209 + 888755344 = 18203^2 + 29812^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220104553 - 2²⁸ = 951669097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240104553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8356808 + ... + 8356953.

It is an arithmetic number, because the mean of its divisors is an integer number (309204597).

Almost surely, 2^1220104553 is an apocalyptic number.

It is an amenable number.

1220104553 is a deficient number, since it is larger than the sum of its proper divisors (16713835).

1220104553 is an equidigital number, since it uses as much as digits as its factorization.

1220104553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16713834.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1220104553 is about 34929.9950329226. The cubic root of 1220104553 is about 1068.5602533176.

Adding to 1220104553 its reverse (3554010221), we get a palindrome (4774114774).

The spelling of 1220104553 in words is "one billion, two hundred twenty million, one hundred four thousand, five hundred fifty-three".