131521202321552 has 20 divisors (see below), whose sum is σ = 254944781426796. Its totient is φ = 65729000663040.

The previous prime is 131521202321533. The next prime is 131521202321557. The reversal of 131521202321552 is 255123202125131.

It can be written as a sum of positive squares in 2 ways, for example, as 66731646075136 + 64789556246416 = 8168944^2 + 8049196^2 .

It is not an unprimeable number, because it can be changed into a prime (131521202321557) 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, 1974996773 + ... + 1975063364.

Almost surely, 2^{131521202321552} is an apocalyptic number.

It is an amenable number.

131521202321552 is a deficient number, since it is larger than the sum of its proper divisors (123423579105244).

131521202321552 is a wasteful number, since it uses less digits than its factorization.

131521202321552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3950062226 (or 3950062220 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 131521202321552 its reverse (255123202125131), we get a palindrome (386644404446683).

The spelling of 131521202321552 in words is "one hundred thirty-one trillion, five hundred twenty-one billion, two hundred two million, three hundred twenty-one thousand, five hundred fifty-two".