1220453155 has 4 divisors (see below), whose sum is σ = 1464543792. Its totient is φ = 976362520.

The previous prime is 1220453149. The next prime is 1220453233. The reversal of 1220453155 is 5513540221.

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

It is not a de Polignac number, because 1220453155 - 2¹¹ = 1220451107 is a prime.

It is a Duffinian 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, 122045311 + ... + 122045320.

It is an arithmetic number, because the mean of its divisors is an integer number (366135948).

Almost surely, 2^1220453155 is an apocalyptic number.

1220453155 is a deficient number, since it is larger than the sum of its proper divisors (244090637).

1220453155 is an equidigital number, since it uses as much as digits as its factorization.

1220453155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244090636.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1220453155 is about 34934.9846858418. The cubic root of 1220453155 is about 1068.6620114743.

Adding to 1220453155 its reverse (5513540221), we get a palindrome (6733993376).

The spelling of 1220453155 in words is "one billion, two hundred twenty million, four hundred fifty-three thousand, one hundred fifty-five".