7133531 has 4 divisors (see below), whose sum is σ = 7509000. Its totient is φ = 6758064.

The previous prime is 7133527. The next prime is 7133537. The reversal of 7133531 is 1353317.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7133531 - 2² = 7133527 is a prime.

It is a super-2 number, since 2×7133531² = 101774529055922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7133497 and 7133506.

It is not an unprimeable number, because it can be changed into a prime (7133537) 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, 187706 + ... + 187743.

It is an arithmetic number, because the mean of its divisors is an integer number (1877250).

Almost surely, 2^7133531 is an apocalyptic number.

7133531 is a deficient number, since it is larger than the sum of its proper divisors (375469).

7133531 is a wasteful number, since it uses less digits than its factorization.

7133531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375468.

The product of its digits is 945, while the sum is 23.

The square root of 7133531 is about 2670.8670876702. The cubic root of 7133531 is about 192.5018249110.

Adding to 7133531 its reverse (1353317), we get a palindrome (8486848).

The spelling of 7133531 in words is "seven million, one hundred thirty-three thousand, five hundred thirty-one".