1131400205 has 8 divisors (see below), whose sum is σ = 1462117272. Its totient is φ = 835495488.

The previous prime is 1131400189. The next prime is 1131400213. The reversal of 1131400205 is 5020041311.

It can be written as a sum of positive squares in 4 ways, for example, as 28761769 + 1102638436 = 5363^2 + 33206^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1131400205 - 2⁴ = 1131400189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8703014 + ... + 8703143.

It is an arithmetic number, because the mean of its divisors is an integer number (182764659).

Almost surely, 2^1131400205 is an apocalyptic number.

It is an amenable number.

1131400205 is a deficient number, since it is larger than the sum of its proper divisors (330717067).

1131400205 is a wasteful number, since it uses less digits than its factorization.

1131400205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17406175.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1131400205 is about 33636.2929735130. The cubic root of 1131400205 is about 1042.0104739327.

Adding to 1131400205 its reverse (5020041311), we get a palindrome (6151441516).

The spelling of 1131400205 in words is "one billion, one hundred thirty-one million, four hundred thousand, two hundred five".