1157531343 has 8 divisors (see below), whose sum is σ = 1634161968. Its totient is φ = 726294144.

The previous prime is 1157531321. The next prime is 1157531359. The reversal of 1157531343 is 3431357511.

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

It is not a de Polignac number, because 1157531343 - 2¹² = 1157527247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157511343) 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, 11348296 + ... + 11348397.

It is an arithmetic number, because the mean of its divisors is an integer number (204270246).

Almost surely, 2^1157531343 is an apocalyptic number.

1157531343 is a deficient number, since it is larger than the sum of its proper divisors (476630625).

1157531343 is a wasteful number, since it uses less digits than its factorization.

1157531343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22696713.

The product of its digits is 18900, while the sum is 33.

The square root of 1157531343 is about 34022.5122970071. The cubic root of 1157531343 is about 1049.9716826830.

Adding to 1157531343 its reverse (3431357511), we get a palindrome (4588888854).

The spelling of 1157531343 in words is "one billion, one hundred fifty-seven million, five hundred thirty-one thousand, three hundred forty-three".