1220531204 has 12 divisors (see below), whose sum is σ = 2141006028. Its totient is φ = 608815200.

The previous prime is 1220531197. The next prime is 1220531227. The reversal of 1220531204 is 4021350221.

It can be written as a sum of positive squares in 2 ways, for example, as 416241604 + 804289600 = 20402^2 + 28360^2 .

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, 360707 + ... + 364074.

It is an arithmetic number, because the mean of its divisors is an integer number (178417169).

Almost surely, 2^1220531204 is an apocalyptic number.

It is an amenable number.

1220531204 is a deficient number, since it is larger than the sum of its proper divisors (920474824).

1220531204 is a wasteful number, since it uses less digits than its factorization.

1220531204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725206 (or 725204 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1220531204 is about 34936.1017287275. The cubic root of 1220531204 is about 1068.6847915985.

Adding to 1220531204 its reverse (4021350221), we get a palindrome (5241881425).

The spelling of 1220531204 in words is "one billion, two hundred twenty million, five hundred thirty-one thousand, two hundred four".