131520435 has 8 divisors (see below), whose sum is σ = 210432720. Its totient is φ = 70144224.

The previous prime is 131520419. The next prime is 131520439. The reversal of 131520435 is 534025131.

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

It is not a de Polignac number, because 131520435 - 2⁴ = 131520419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131520439) 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, 4384000 + ... + 4384029.

It is an arithmetic number, because the mean of its divisors is an integer number (26304090).

Almost surely, 2^131520435 is an apocalyptic number.

131520435 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131520435 is a deficient number, since it is larger than the sum of its proper divisors (78912285).

131520435 is an equidigital number, since it uses as much as digits as its factorization.

131520435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8768037.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 131520435 is about 11468.2359149086. The cubic root of 131520435 is about 508.5469791429.

Adding to 131520435 its reverse (534025131), we get a palindrome (665545566).

The spelling of 131520435 in words is "one hundred thirty-one million, five hundred twenty thousand, four hundred thirty-five".