131051520 has 260 divisors, whose sum is σ = 475733280. Its totient is φ = 34504704.

The previous prime is 131051513. The next prime is 131051527. The reversal of 131051520 is 25150131.

131051520 is a `hidden beast` number, since 131 + 0 + 515 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (131051513) and next prime (131051527).

It is a super-3 number, since 3×131051520³ (a number of 25 digits) contains 333 as substring.

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 = 131051493 and 131051502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131051527) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1658841 + ... + 1658919.

Almost surely, 2^131051520 is an apocalyptic number.

131051520 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 131051520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237866640).

131051520 is an abundant number, since it is smaller than the sum of its proper divisors (344681760).

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

131051520 is an frugal number, since it uses more digits than its factorization.

131051520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 131051520 is about 11447.7735826666. The cubic root of 131051520 is about 507.9418785676.

The spelling of 131051520 in words is "one hundred thirty-one million, fifty-one thousand, five hundred twenty".