1331125550 has 48 divisors (see below), whose sum is σ = 2525731200. Its totient is φ = 521791200.

The previous prime is 1331125519. The next prime is 1331125583. The reversal of 1331125550 is 555211331.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1447991 + ... + 1448909.

It is an arithmetic number, because the mean of its divisors is an integer number (52619400).

Almost surely, 2^1331125550 is an apocalyptic number.

1331125550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1331125550 is a deficient number, since it is larger than the sum of its proper divisors (1194605650).

1331125550 is a wasteful number, since it uses less digits than its factorization.

1331125550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481 (or 1476 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 1331125550 is about 36484.5933237579. The cubic root of 1331125550 is about 1100.0345856894.

Adding to 1331125550 its reverse (555211331), we get a palindrome (1886336881).

The spelling of 1331125550 in words is "one billion, three hundred thirty-one million, one hundred twenty-five thousand, five hundred fifty".