131225760 has 72 divisors (see below), whose sum is σ = 447812820. Its totient is φ = 34993152.

The previous prime is 131225747. The next prime is 131225777. The reversal of 131225760 is 67522131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 130233744 + 992016 = 11412^2 + 996^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-3 number, since 3×131225760³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44125 + ... + 47004.

Almost surely, 2^131225760 is an apocalyptic number.

131225760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131225760 is an abundant number, since it is smaller than the sum of its proper divisors (316587060).

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

131225760 is a wasteful number, since it uses less digits than its factorization.

131225760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91150 (or 91139 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 131225760 is about 11455.3812682075. The cubic root of 131225760 is about 508.1668908334.

Adding to 131225760 its reverse (67522131), we get a palindrome (198747891).

It can be divided in two parts, 1312 and 25760, that added together give a palindrome (27072).

The spelling of 131225760 in words is "one hundred thirty-one million, two hundred twenty-five thousand, seven hundred sixty".