131505021355 has 8 divisors (see below), whose sum is σ = 157845024000. Its totient is φ = 105178018176.

The previous prime is 131505021257. The next prime is 131505021359. The reversal of 131505021355 is 553120505131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131505021355 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131505021359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3227595 + ... + 3268084.

It is an arithmetic number, because the mean of its divisors is an integer number (19730628000).

Almost surely, 2^131505021355 is an apocalyptic number.

131505021355 is a deficient number, since it is larger than the sum of its proper divisors (26340002645).

131505021355 is an equidigital number, since it uses as much as digits as its factorization.

131505021355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6499733.

The product of its (nonzero) digits is 11250, while the sum is 31.

Adding to 131505021355 its reverse (553120505131), we get a palindrome (684625526486).

The spelling of 131505021355 in words is "one hundred thirty-one billion, five hundred five million, twenty-one thousand, three hundred fifty-five".