311223201425 has 6 divisors (see below), whose sum is σ = 385916769798. Its totient is φ = 248978561120.

The previous prime is 311223201347. The next prime is 311223201427. The reversal of 311223201425 is 524102322113.

It can be written as a sum of positive squares in 3 ways, for example, as 40532963584 + 270690237841 = 201328^2 + 520279^2 .

It is not a de Polignac number, because 311223201425 - 2⁸ = 311223201169 is a prime.

It is a super-2 number, since 2×311223201425² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311223201394 and 311223201403.

It is not an unprimeable number, because it can be changed into a prime (311223201427) 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, 6224464004 + ... + 6224464053.

It is an arithmetic number, because the mean of its divisors is an integer number (64319461633).

Almost surely, 2^311223201425 is an apocalyptic number.

It is an amenable number.

311223201425 is a deficient number, since it is larger than the sum of its proper divisors (74693568373).

311223201425 is a wasteful number, since it uses less digits than its factorization.

311223201425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12448928067 (or 12448928062 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 311223201425 its reverse (524102322113), we get a palindrome (835325523538).

The spelling of 311223201425 in words is "three hundred eleven billion, two hundred twenty-three million, two hundred one thousand, four hundred twenty-five".