1131143402 has 4 divisors (see below), whose sum is σ = 1696715106. Its totient is φ = 565571700.

The previous prime is 1131143401. The next prime is 1131143413. The reversal of 1131143402 is 2043411311.

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., 694375201 + 436768201 = 26351^2 + 20899^2 .

It is not an unprimeable number, because it can be changed into a prime (1131143401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282785849 + ... + 282785852.

Almost surely, 2^1131143402 is an apocalyptic number.

1131143402 is a deficient number, since it is larger than the sum of its proper divisors (565571704).

1131143402 is an equidigital number, since it uses as much as digits as its factorization.

1131143402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565571703.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1131143402 is about 33632.4754069634. The cubic root of 1131143402 is about 1041.9316301357.

Adding to 1131143402 its reverse (2043411311), we get a palindrome (3174554713).

The spelling of 1131143402 in words is "one billion, one hundred thirty-one million, one hundred forty-three thousand, four hundred two".