1131401331 has 16 divisors (see below), whose sum is σ = 1733949600. Its totient is φ = 728257824.

The previous prime is 1131401321. The next prime is 1131401339. The reversal of 1131401331 is 1331041311.

It is not a de Polignac number, because 1131401331 - 2¹³ = 1131393139 is a prime.

It is a super-2 number, since 2×1131401331² = 2560137943577143122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1131401339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 721696 + ... + 723261.

It is an arithmetic number, because the mean of its divisors is an integer number (108371850).

Almost surely, 2^1131401331 is an apocalyptic number.

1131401331 is a deficient number, since it is larger than the sum of its proper divisors (602548269).

1131401331 is a wasteful number, since it uses less digits than its factorization.

1131401331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444995 (or 1444989 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1131401331 is about 33636.3097113818. The cubic root of 1131401331 is about 1042.0108196115.

Adding to 1131401331 its reverse (1331041311), we get a palindrome (2462442642).

The spelling of 1131401331 in words is "one billion, one hundred thirty-one million, four hundred one thousand, three hundred thirty-one".