1312332550 has 12 divisors (see below), whose sum is σ = 2440938636. Its totient is φ = 524933000.

The previous prime is 1312332521. The next prime is 1312332557. The reversal of 1312332550 is 552332131.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312332557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13123276 + ... + 13123375.

It is an arithmetic number, because the mean of its divisors is an integer number (203411553).

Almost surely, 2^1312332550 is an apocalyptic number.

1312332550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312332550 is a deficient number, since it is larger than the sum of its proper divisors (1128606086).

1312332550 is a wasteful number, since it uses less digits than its factorization.

1312332550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26246663 (or 26246658 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 1312332550 is about 36226.1307621998. The cubic root of 1312332550 is about 1094.8332210565.

Adding to 1312332550 its reverse (552332131), we get a palindrome (1864664681).

The spelling of 1312332550 in words is "one billion, three hundred twelve million, three hundred thirty-two thousand, five hundred fifty".