1312055554 has 4 divisors (see below), whose sum is σ = 1968083334. Its totient is φ = 656027776.

The previous prime is 1312055551. The next prime is 1312055561. The reversal of 1312055554 is 4555502131.

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

It can be written as a sum of positive squares in only one way, i.e., 772562025 + 539493529 = 27795^2 + 23227^2 .

It is not an unprimeable number, because it can be changed into a prime (1312055551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328013887 + ... + 328013890.

Almost surely, 2^1312055554 is an apocalyptic number.

1312055554 is a deficient number, since it is larger than the sum of its proper divisors (656027780).

1312055554 is an equidigital number, since it uses as much as digits as its factorization.

1312055554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656027779.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 1312055554 is about 36222.3074085570. The cubic root of 1312055554 is about 1094.7561862728.

Adding to 1312055554 its reverse (4555502131), we get a palindrome (5867557685).

The spelling of 1312055554 in words is "one billion, three hundred twelve million, fifty-five thousand, five hundred fifty-four".