230540531 has 4 divisors (see below), whose sum is σ = 248274432. Its totient is φ = 212806632.

The previous prime is 230540491. The next prime is 230540543. The reversal of 230540531 is 135045032.

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 230540531 - 2⁶ = 230540467 is a prime.

It is a super-2 number, since 2×230540531² = 106297872867523922, 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 = 230540497 and 230540506.

It is not an unprimeable number, because it can be changed into a prime (230540561) 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, 8866931 + ... + 8866956.

It is an arithmetic number, because the mean of its divisors is an integer number (62068608).

Almost surely, 2^230540531 is an apocalyptic number.

230540531 is a deficient number, since it is larger than the sum of its proper divisors (17733901).

230540531 is a wasteful number, since it uses less digits than its factorization.

230540531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17733900.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 230540531 is about 15183.5612094133. The cubic root of 230540531 is about 613.1721620529.

Adding to 230540531 its reverse (135045032), we get a palindrome (365585563).

The spelling of 230540531 in words is "two hundred thirty million, five hundred forty thousand, five hundred thirty-one".