1205552331 has 12 divisors (see below), whose sum is σ = 1843786152. Its totient is φ = 756424896.

The previous prime is 1205552329. The next prime is 1205552347. The reversal of 1205552331 is 1332555021.

It is a happy number.

It is not a de Polignac number, because 1205552331 - 2¹ = 1205552329 is a prime.

It is a super-2 number, since 2×1205552331² = 2906712845559067122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1205552295 and 1205552304.

It is not an unprimeable number, because it can be changed into a prime (1205552371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3939561 + ... + 3939866.

It is an arithmetic number, because the mean of its divisors is an integer number (153648846).

Almost surely, 2^1205552331 is an apocalyptic number.

1205552331 is a deficient number, since it is larger than the sum of its proper divisors (638233821).

1205552331 is a wasteful number, since it uses less digits than its factorization.

1205552331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7879450 (or 7879447 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 1205552331 is about 34721.0646582158. The cubic root of 1205552331 is about 1064.2950012449.

It can be divided in two parts, 1205 and 552331, that added together give a square (553536 = 744²).

The spelling of 1205552331 in words is "one billion, two hundred five million, five hundred fifty-two thousand, three hundred thirty-one".