1312533550 has 24 divisors (see below), whose sum is σ = 2457711000. Its totient is φ = 521486880.

The previous prime is 1312533461. The next prime is 1312533553. The reversal of 1312533550 is 553352131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312533553) 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, 80640 + ... + 95539.

It is an arithmetic number, because the mean of its divisors is an integer number (102404625).

Almost surely, 2^1312533550 is an apocalyptic number.

1312533550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312533550 is a deficient number, since it is larger than the sum of its proper divisors (1145177450).

1312533550 is a wasteful number, since it uses less digits than its factorization.

1312533550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176340 (or 176335 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 28.

The square root of 1312533550 is about 36228.9048965049. The cubic root of 1312533550 is about 1094.8891139634.

Adding to 1312533550 its reverse (553352131), we get a palindrome (1865885681).

The spelling of 1312533550 in words is "one billion, three hundred twelve million, five hundred thirty-three thousand, five hundred fifty".