1223621355 has 32 divisors (see below), whose sum is σ = 2171992320. Its totient is φ = 583210880.

The previous prime is 1223621323. The next prime is 1223621381. The reversal of 1223621355 is 5531263221.

It is not a de Polignac number, because 1223621355 - 2⁵ = 1223621323 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53112 + ... + 72581.

It is an arithmetic number, because the mean of its divisors is an integer number (67874760).

Almost surely, 2^1223621355 is an apocalyptic number.

1223621355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1223621355 is a deficient number, since it is larger than the sum of its proper divisors (948370965).

1223621355 is a wasteful number, since it uses less digits than its factorization.

1223621355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125771.

The product of its digits is 10800, while the sum is 30.

The square root of 1223621355 is about 34980.2995270195. The cubic root of 1223621355 is about 1069.5859331855.

Adding to 1223621355 its reverse (5531263221), we get a palindrome (6754884576).

The spelling of 1223621355 in words is "one billion, two hundred twenty-three million, six hundred twenty-one thousand, three hundred fifty-five".