1431537157 has 4 divisors (see below), whose sum is σ = 1445435680. Its totient is φ = 1417638636.

The previous prime is 1431537131. The next prime is 1431537167. The reversal of 1431537157 is 7517351341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7517351341 = 6301 ⋅1193041.

It is a cyclic number.

It is not a de Polignac number, because 1431537157 - 2²³ = 1423148549 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 (1431537167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6949107 + ... + 6949312.

It is an arithmetic number, because the mean of its divisors is an integer number (361358920).

Almost surely, 2^1431537157 is an apocalyptic number.

It is an amenable number.

1431537157 is a deficient number, since it is larger than the sum of its proper divisors (13898523).

1431537157 is a wasteful number, since it uses less digits than its factorization.

1431537157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13898522.

The product of its digits is 44100, while the sum is 37.

The square root of 1431537157 is about 37835.6598594501. The cubic root of 1431537157 is about 1127.0267089899.

Adding to 1431537157 its reverse (7517351341), we get a palindrome (8948888498).

The spelling of 1431537157 in words is "one billion, four hundred thirty-one million, five hundred thirty-seven thousand, one hundred fifty-seven".