313220133551 has 4 divisors (see below), whose sum is σ = 337313989992. Its totient is φ = 289126277112.

The previous prime is 313220133521. The next prime is 313220133607. The reversal of 313220133551 is 155331022313.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 313220133551 - 2⁶ = 313220133487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313220133521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12046928201 + ... + 12046928226.

It is an arithmetic number, because the mean of its divisors is an integer number (84328497498).

Almost surely, 2^313220133551 is an apocalyptic number.

313220133551 is a deficient number, since it is larger than the sum of its proper divisors (24093856441).

313220133551 is a wasteful number, since it uses less digits than its factorization.

313220133551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24093856440.

The product of its (nonzero) digits is 8100, while the sum is 29.

Adding to 313220133551 its reverse (155331022313), we get a palindrome (468551155864).

The spelling of 313220133551 in words is "three hundred thirteen billion, two hundred twenty million, one hundred thirty-three thousand, five hundred fifty-one".