1131516431 has 2 divisors, whose sum is σ = 1131516432. Its totient is φ = 1131516430.

The previous prime is 1131516383. The next prime is 1131516439. The reversal of 1131516431 is 1346151311.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1131516431 - 2²² = 1127322127 is a prime.

It is a super-2 number, since 2×1131516431² = 2560658867245955522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1131516431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131516439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565758215 + 565758216.

It is an arithmetic number, because the mean of its divisors is an integer number (565758216).

Almost surely, 2^1131516431 is an apocalyptic number.

1131516431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131516431 is an equidigital number, since it uses as much as digits as its factorization.

1131516431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 26.

The square root of 1131516431 is about 33638.0206165583. The cubic root of 1131516431 is about 1042.0461537808.

Adding to 1131516431 its reverse (1346151311), we get a palindrome (2477667742).

The spelling of 1131516431 in words is "one billion, one hundred thirty-one million, five hundred sixteen thousand, four hundred thirty-one".