131524220 has 24 divisors (see below), whose sum is σ = 278939808. Its totient is φ = 52088000.

The previous prime is 131524219. The next prime is 131524231. The reversal of 131524220 is 22425131.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 131524192 and 131524201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30536 + ... + 34575.

It is an arithmetic number, because the mean of its divisors is an integer number (11622492).

Almost surely, 2^131524220 is an apocalyptic number.

131524220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131524220 is an abundant number, since it is smaller than the sum of its proper divisors (147415588).

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

131524220 is a wasteful number, since it uses less digits than its factorization.

131524220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65221 (or 65219 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 131524220 is about 11468.4009347424. The cubic root of 131524220 is about 508.5518575530.

Adding to 131524220 its reverse (22425131), we get a palindrome (153949351).

The spelling of 131524220 in words is "one hundred thirty-one million, five hundred twenty-four thousand, two hundred twenty".