1131401431 has 4 divisors (see below), whose sum is σ = 1132839832. Its totient is φ = 1129963032.

The previous prime is 1131401407. The next prime is 1131401477. The reversal of 1131401431 is 1341041311.

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

It is a cyclic number.

It is not a de Polignac number, because 1131401431 - 2¹³ = 1131393239 is a prime.

It is a super-2 number, since 2×1131401431² = 2560138396137695522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131401399 and 1131401408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131101431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 718020 + ... + 719593.

It is an arithmetic number, because the mean of its divisors is an integer number (283209958).

Almost surely, 2^1131401431 is an apocalyptic number.

1131401431 is a deficient number, since it is larger than the sum of its proper divisors (1438401).

1131401431 is an equidigital number, since it uses as much as digits as its factorization.

1131401431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438400.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1131401431 is about 33636.3111978707. The cubic root of 1131401431 is about 1042.0108503112.

Adding to 1131401431 its reverse (1341041311), we get a palindrome (2472442742).

The spelling of 1131401431 in words is "one billion, one hundred thirty-one million, four hundred one thousand, four hundred thirty-one".