1220154545 has 16 divisors (see below), whose sum is σ = 1504908288. Its totient is φ = 949241280.

The previous prime is 1220154527. The next prime is 1220154557. The reversal of 1220154545 is 5454510221.

1220154545 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-1220154545 is a prime.

It is a super-2 number, since 2×1220154545² = 2977554227368314050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20360 + ... + 53430.

It is an arithmetic number, because the mean of its divisors is an integer number (94056768).

Almost surely, 2^1220154545 is an apocalyptic number.

It is an amenable number.

1220154545 is a deficient number, since it is larger than the sum of its proper divisors (284753743).

1220154545 is a wasteful number, since it uses less digits than its factorization.

1220154545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33280.

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 1220154545 is about 34930.7106283282. The cubic root of 1220154545 is about 1068.5748473496.

Adding to 1220154545 its reverse (5454510221), we get a palindrome (6674664766).

The spelling of 1220154545 in words is "one billion, two hundred twenty million, one hundred fifty-four thousand, five hundred forty-five".