1131516421 has 8 divisors (see below), whose sum is σ = 1311375744. Its totient is φ = 956210640.

The previous prime is 1131516383. The next prime is 1131516431. The reversal of 1131516421 is 1246151311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1131516421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131516431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1137850 + ... + 1138843.

It is an arithmetic number, because the mean of its divisors is an integer number (163921968).

Almost surely, 2^1131516421 is an apocalyptic number.

It is an amenable number.

1131516421 is a deficient number, since it is larger than the sum of its proper divisors (179859323).

1131516421 is an equidigital number, since it uses as much as digits as its factorization.

1131516421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276771.

The product of its digits is 720, while the sum is 25.

The square root of 1131516421 is about 33638.0204679170. The cubic root of 1131516421 is about 1042.0461507110.

Adding to 1131516421 its reverse (1246151311), we get a palindrome (2377667732).

The spelling of 1131516421 in words is "one billion, one hundred thirty-one million, five hundred sixteen thousand, four hundred twenty-one".