131223760 has 40 divisors (see below), whose sum is σ = 310861800. Its totient is φ = 51497472.

The previous prime is 131223737. The next prime is 131223761. The reversal of 131223760 is 67322131.

It can be written as a sum of positive squares in 4 ways, for example, as 57881664 + 73342096 = 7608^2 + 8564^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131223761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11235 + ... + 19714.

It is an arithmetic number, because the mean of its divisors is an integer number (7771545).

Almost surely, 2^131223760 is an apocalyptic number.

131223760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131223760 is an abundant number, since it is smaller than the sum of its proper divisors (179638040).

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

131223760 is a wasteful number, since it uses less digits than its factorization.

131223760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31015 (or 31009 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 131223760 is about 11455.2939726574. The cubic root of 131223760 is about 508.1643091783.

Adding to 131223760 its reverse (67322131), we get a palindrome (198545891).

The spelling of 131223760 in words is "one hundred thirty-one million, two hundred twenty-three thousand, seven hundred sixty".