11311055031 has 16 divisors (see below), whose sum is σ = 15527701728. Its totient is φ = 7319424000.

The previous prime is 11311055027. The next prime is 11311055059. The reversal of 11311055031 is 13055011311.

It is not a de Polignac number, because 11311055031 - 2² = 11311055027 is a prime.

It is a super-2 number, since 2×11311055031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11311054989 and 11311055007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311055071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209170 + ... + 257631.

It is an arithmetic number, because the mean of its divisors is an integer number (970481358).

Almost surely, 2^11311055031 is an apocalyptic number.

11311055031 is a deficient number, since it is larger than the sum of its proper divisors (4216646697).

11311055031 is a wasteful number, since it uses less digits than its factorization.

11311055031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467042.

The product of its (nonzero) digits is 225, while the sum is 21.

Adding to 11311055031 its reverse (13055011311), we get a palindrome (24366066342).

The spelling of 11311055031 in words is "eleven billion, three hundred eleven million, fifty-five thousand, thirty-one".