131505621207 has 4 divisors (see below), whose sum is σ = 175340828280. Its totient is φ = 87670414136.

The previous prime is 131505621199. The next prime is 131505621211. The reversal of 131505621207 is 702126505131.

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 131505621207 - 2³ = 131505621199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131505621407) 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, 21917603532 + ... + 21917603537.

It is an arithmetic number, because the mean of its divisors is an integer number (43835207070).

Almost surely, 2^131505621207 is an apocalyptic number.

131505621207 is a deficient number, since it is larger than the sum of its proper divisors (43835207073).

131505621207 is an equidigital number, since it uses as much as digits as its factorization.

131505621207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43835207072.

The product of its (nonzero) digits is 12600, while the sum is 33.

The spelling of 131505621207 in words is "one hundred thirty-one billion, five hundred five million, six hundred twenty-one thousand, two hundred seven".