11431531351 has 4 divisors (see below), whose sum is σ = 11434997704. Its totient is φ = 11428065000.

The previous prime is 11431531343. The next prime is 11431531361. The reversal of 11431531351 is 15313513411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15313513411 = 7 ⋅2187644773.

It is a cyclic number.

It is not a de Polignac number, because 11431531351 - 2³ = 11431531343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11431531361) 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, 1728225 + ... + 1734826.

It is an arithmetic number, because the mean of its divisors is an integer number (2858749426).

Almost surely, 2^11431531351 is an apocalyptic number.

11431531351 is a deficient number, since it is larger than the sum of its proper divisors (3466353).

11431531351 is an equidigital number, since it uses as much as digits as its factorization.

11431531351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3466352.

The product of its digits is 2700, while the sum is 28.

The spelling of 11431531351 in words is "eleven billion, four hundred thirty-one million, five hundred thirty-one thousand, three hundred fifty-one".