1523135231 has 8 divisors (see below), whose sum is σ = 1545136560. Its totient is φ = 1501242688.

The previous prime is 1523135203. The next prime is 1523135329. The reversal of 1523135231 is 1325313251.

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

It is a cyclic number.

It is not a de Polignac number, because 1523135231 - 2¹⁸ = 1522873087 is a prime.

It is a super-2 number, since 2×1523135231² = 4639881863826846722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1523135231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1523135531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1220 + ... + 55206.

It is an arithmetic number, because the mean of its divisors is an integer number (193142070).

Almost surely, 2^1523135231 is an apocalyptic number.

1523135231 is a deficient number, since it is larger than the sum of its proper divisors (22001329).

1523135231 is an equidigital number, since it uses as much as digits as its factorization.

1523135231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54393.

The product of its digits is 2700, while the sum is 26.

The square root of 1523135231 is about 39027.3651557468. The cubic root of 1523135231 is about 1150.5694044742.

Adding to 1523135231 its reverse (1325313251), we get a palindrome (2848448482).

The spelling of 1523135231 in words is "one billion, five hundred twenty-three million, one hundred thirty-five thousand, two hundred thirty-one".