1431543157 has 8 divisors (see below), whose sum is σ = 1653547392. Its totient is φ = 1224849600.

The previous prime is 1431543151. The next prime is 1431543173. The reversal of 1431543157 is 7513451341.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1431543157 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 (1431543151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3827469 + ... + 3827842.

It is an arithmetic number, because the mean of its divisors is an integer number (206693424).

Almost surely, 2^1431543157 is an apocalyptic number.

1431543157 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1431543157 is a deficient number, since it is larger than the sum of its proper divisors (222004235).

1431543157 is a wasteful number, since it uses less digits than its factorization.

1431543157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7655339.

The product of its digits is 25200, while the sum is 34.

The square root of 1431543157 is about 37835.7391496453. The cubic root of 1431543157 is about 1127.0282835563.

Adding to 1431543157 its reverse (7513451341), we get a palindrome (8944994498).

The spelling of 1431543157 in words is "one billion, four hundred thirty-one million, five hundred forty-three thousand, one hundred fifty-seven".