131613521226 has 32 divisors (see below), whose sum is σ = 287260579008. Its totient is φ = 39868467840.

The previous prime is 131613521213. The next prime is 131613521233. The reversal of 131613521226 is 622125316131.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175765 + ... + 542328.

It is an arithmetic number, because the mean of its divisors is an integer number (8976893094).

Almost surely, 2^131613521226 is an apocalyptic number.

131613521226 is an abundant number, since it is smaller than the sum of its proper divisors (155647057782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131613521226 is a wasteful number, since it uses less digits than its factorization.

131613521226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720886.

The product of its digits is 12960, while the sum is 33.

Adding to 131613521226 its reverse (622125316131), we get a palindrome (753738837357).

The spelling of 131613521226 in words is "one hundred thirty-one billion, six hundred thirteen million, five hundred twenty-one thousand, two hundred twenty-six".