1313212555 has 8 divisors (see below), whose sum is σ = 1576177344. Its totient is φ = 1050355200.

The previous prime is 1313212553. The next prime is 1313212559. The reversal of 1313212555 is 5552123131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1313212555 - 2¹ = 1313212553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313212553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3070 + ... + 51340.

It is an arithmetic number, because the mean of its divisors is an integer number (197022168).

Almost surely, 2^1313212555 is an apocalyptic number.

1313212555 is a deficient number, since it is larger than the sum of its proper divisors (262964789).

1313212555 is an equidigital number, since it uses as much as digits as its factorization.

1313212555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53717.

The product of its digits is 4500, while the sum is 28.

The square root of 1313212555 is about 36238.2747243850. The cubic root of 1313212555 is about 1095.0778855243.

Adding to 1313212555 its reverse (5552123131), we get a palindrome (6865335686).

The spelling of 1313212555 in words is "one billion, three hundred thirteen million, two hundred twelve thousand, five hundred fifty-five".