1131131402 has 4 divisors (see below), whose sum is σ = 1696697106. Its totient is φ = 565565700.

The previous prime is 1131131359. The next prime is 1131131437. The reversal of 1131131402 is 2041311311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 847916161 + 283215241 = 29119^2 + 16829^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282782849 + ... + 282782852.

Almost surely, 2^1131131402 is an apocalyptic number.

1131131402 is a deficient number, since it is larger than the sum of its proper divisors (565565704).

1131131402 is an equidigital number, since it uses as much as digits as its factorization.

1131131402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565565703.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1131131402 is about 33632.2970074897. The cubic root of 1131131402 is about 1041.9279455974.

Adding to 1131131402 its reverse (2041311311), we get a palindrome (3172442713).

The spelling of 1131131402 in words is "one billion, one hundred thirty-one million, one hundred thirty-one thousand, four hundred two".