1200550331 has 4 divisors (see below), whose sum is σ = 1200992664. Its totient is φ = 1200108000.

The previous prime is 1200550313. The next prime is 1200550357. The reversal of 1200550331 is 1330550021.

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

It is a cyclic number.

It is not a de Polignac number, because 1200550331 - 2²² = 1196356027 is a prime.

It is a super-2 number, since 2×1200550331² = 2882642194528419122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200550391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217070 + ... + 222531.

It is an arithmetic number, because the mean of its divisors is an integer number (300248166).

Almost surely, 2^1200550331 is an apocalyptic number.

1200550331 is a deficient number, since it is larger than the sum of its proper divisors (442333).

1200550331 is an equidigital number, since it uses as much as digits as its factorization.

1200550331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442332.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 1200550331 is about 34648.9585846386. The cubic root of 1200550331 is about 1062.8209926758.

The spelling of 1200550331 in words is "one billion, two hundred million, five hundred fifty thousand, three hundred thirty-one".