131033520 has 120 divisors (see below), whose sum is σ = 443828736. Its totient is φ = 34642944.

The previous prime is 131033503. The next prime is 131033527. The reversal of 131033520 is 25330131.

131033520 is a `hidden beast` number, since 1 + 310 + 3 + 352 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 131033493 and 131033502.

It is not an unprimeable number, because it can be changed into a prime (131033527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90724 + ... + 92156.

Almost surely, 2^131033520 is an apocalyptic number.

131033520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131033520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221914368).

131033520 is an abundant number, since it is smaller than the sum of its proper divisors (312795216).

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

131033520 is a wasteful number, since it uses less digits than its factorization.

131033520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579 (or 1570 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 131033520 is about 11446.9873765983. The cubic root of 131033520 is about 507.9186221352.

Adding to 131033520 its reverse (25330131), we get a palindrome (156363651).

The spelling of 131033520 in words is "one hundred thirty-one million, thirty-three thousand, five hundred twenty".