131132232220 has 48 divisors (see below), whose sum is σ = 300520686816. Its totient is φ = 47667200000.

The previous prime is 131132232211. The next prime is 131132232247. The reversal of 131132232220 is 22232231131.

It is a super-2 number, since 2×131132232220² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 131132232191 and 131132232200.

It is a congruent number.

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, 509820 + ... + 722620.

It is an arithmetic number, because the mean of its divisors is an integer number (6260847642).

Almost surely, 2^131132232220 is an apocalyptic number.

131132232220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131132232220 is an abundant number, since it is smaller than the sum of its proper divisors (169388454596).

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

131132232220 is a wasteful number, since it uses less digits than its factorization.

131132232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215622 (or 215620 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 131132232220 its reverse (22232231131), we get a palindrome (153364463351).

The spelling of 131132232220 in words is "one hundred thirty-one billion, one hundred thirty-two million, two hundred thirty-two thousand, two hundred twenty".