1131251933 has 4 divisors (see below), whose sum is σ = 1292859360. Its totient is φ = 969644508.

The previous prime is 1131251911. The next prime is 1131251971. The reversal of 1131251933 is 3391521311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3391521311 = 31193 ⋅108727.

It is not a de Polignac number, because 1131251933 - 2¹⁰ = 1131250909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131251896 and 1131251905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131251983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80803703 + ... + 80803716.

It is an arithmetic number, because the mean of its divisors is an integer number (323214840).

Almost surely, 2^1131251933 is an apocalyptic number.

It is an amenable number.

1131251933 is a deficient number, since it is larger than the sum of its proper divisors (161607427).

1131251933 is an equidigital number, since it uses as much as digits as its factorization.

1131251933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161607426.

The product of its digits is 2430, while the sum is 29.

The square root of 1131251933 is about 33634.0888534237. The cubic root of 1131251933 is about 1041.9649528382.

The spelling of 1131251933 in words is "one billion, one hundred thirty-one million, two hundred fifty-one thousand, nine hundred thirty-three".