601531231 has 4 divisors (see below), whose sum is σ = 687464272. Its totient is φ = 515598192.

The previous prime is 601531219. The next prime is 601531267. The reversal of 601531231 is 132135106.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132135106 = 2 ⋅66067553.

It is a cyclic number.

It is not a de Polignac number, because 601531231 - 2¹¹ = 601529183 is a prime.

It is a super-2 number, since 2×601531231² = 723679643736750722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (601531631) 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, 42966510 + ... + 42966523.

It is an arithmetic number, because the mean of its divisors is an integer number (171866068).

Almost surely, 2^601531231 is an apocalyptic number.

601531231 is a deficient number, since it is larger than the sum of its proper divisors (85933041).

601531231 is an equidigital number, since it uses as much as digits as its factorization.

601531231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85933040.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 601531231 is about 24526.1336333308. The cubic root of 601531231 is about 844.1495503843.

Adding to 601531231 its reverse (132135106), we get a palindrome (733666337).

The spelling of 601531231 in words is "six hundred one million, five hundred thirty-one thousand, two hundred thirty-one".