1220551403 has 2 divisors, whose sum is σ = 1220551404. Its totient is φ = 1220551402.

The previous prime is 1220551361. The next prime is 1220551411. The reversal of 1220551403 is 3041550221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220551403 - 2⁸ = 1220551147 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220551433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610275701 + 610275702.

It is an arithmetic number, because the mean of its divisors is an integer number (610275702).

Almost surely, 2^1220551403 is an apocalyptic number.

1220551403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220551403 is an equidigital number, since it uses as much as digits as its factorization.

1220551403 is an evil number, because the sum of its binary digits is even.

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

The square root of 1220551403 is about 34936.3908124466. The cubic root of 1220551403 is about 1068.6906869127.

The spelling of 1220551403 in words is "one billion, two hundred twenty million, five hundred fifty-one thousand, four hundred three".