311531450461 has 32 divisors (see below), whose sum is σ = 402254657280. Its totient is φ = 234113510400.

The previous prime is 311531450459. The next prime is 311531450473. The reversal of 311531450461 is 164054135113.

It is not a de Polignac number, because 311531450461 - 2¹ = 311531450459 is a prime.

It is a super-2 number, since 2×311531450461² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311531450401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1888095 + ... + 2046451.

It is an arithmetic number, because the mean of its divisors is an integer number (12570458040).

Almost surely, 2^311531450461 is an apocalyptic number.

It is an amenable number.

311531450461 is a deficient number, since it is larger than the sum of its proper divisors (90723206819).

311531450461 is a wasteful number, since it uses less digits than its factorization.

311531450461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159285.

The product of its (nonzero) digits is 21600, while the sum is 34.

Adding to 311531450461 its reverse (164054135113), we get a palindrome (475585585574).

The spelling of 311531450461 in words is "three hundred eleven billion, five hundred thirty-one million, four hundred fifty thousand, four hundred sixty-one".