7531137243 has 40 divisors (see below), whose sum is σ = 12890162912. Its totient is φ = 4292538624.

The previous prime is 7531137221. The next prime is 7531137253. The reversal of 7531137243 is 3427311357.

7531137243 is a `hidden beast` number, since 7 + 531 + 13 + 72 + 43 = 666.

It is not a de Polignac number, because 7531137243 - 2²² = 7526942939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7531137198 and 7531137207.

It is not an unprimeable number, because it can be changed into a prime (7531137253) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 208371 + ... + 241827.

Almost surely, 2^7531137243 is an apocalyptic number.

7531137243 is a deficient number, since it is larger than the sum of its proper divisors (5359025669).

7531137243 is a wasteful number, since it uses less digits than its factorization.

7531137243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33873 (or 33864 counting only the distinct ones).

The product of its digits is 52920, while the sum is 36.

The square root of 7531137243 is about 86782.1251353065. The cubic root of 7531137243 is about 1960.1389290492.

The spelling of 7531137243 in words is "seven billion, five hundred thirty-one million, one hundred thirty-seven thousand, two hundred forty-three".