1172133131 has 6 divisors (see below), whose sum is σ = 1269233100. Its totient is φ = 1081968888.

The previous prime is 1172133113. The next prime is 1172133167. The reversal of 1172133131 is 1313312711.

It is a de Polignac number, because none of the positive numbers 2^k-1172133131 is a prime.

It is a super-2 number, since 2×1172133131² = 2747792153575726322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1172133097 and 1172133106.

It is not an unprimeable number, because it can be changed into a prime (1172133931) 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, 3467681 + ... + 3468018.

It is an arithmetic number, because the mean of its divisors is an integer number (211538850).

Almost surely, 2^1172133131 is an apocalyptic number.

1172133131 is a deficient number, since it is larger than the sum of its proper divisors (97099969).

1172133131 is an equidigital number, since it uses as much as digits as its factorization.

1172133131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6935725 (or 6935712 counting only the distinct ones).

The product of its digits is 378, while the sum is 23.

The square root of 1172133131 is about 34236.4298810492. The cubic root of 1172133131 is about 1054.3682361192.

Adding to 1172133131 its reverse (1313312711), we get a palindrome (2485445842).

The spelling of 1172133131 in words is "one billion, one hundred seventy-two million, one hundred thirty-three thousand, one hundred thirty-one".