1131523031 has 2 divisors, whose sum is σ = 1131523032. Its totient is φ = 1131523030.

The previous prime is 1131523007. The next prime is 1131523051. The reversal of 1131523031 is 1303251311.

It is an a-pointer prime, because the next prime (1131523051) can be obtained adding 1131523031 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1131523031 - 2¹⁴ = 1131506647 is a prime.

It is a super-2 number, since 2×1131523031² = 2560688739366853922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1131522994 and 1131523012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131523051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565761515 + 565761516.

It is an arithmetic number, because the mean of its divisors is an integer number (565761516).

Almost surely, 2^1131523031 is an apocalyptic number.

1131523031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131523031 is an equidigital number, since it uses as much as digits as its factorization.

1131523031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 1131523031 is about 33638.1187196906. The cubic root of 1131523031 is about 1042.0481798204.

Adding to 1131523031 its reverse (1303251311), we get a palindrome (2434774342).

The spelling of 1131523031 in words is "one billion, one hundred thirty-one million, five hundred twenty-three thousand, thirty-one".