131003720 has 16 divisors (see below), whose sum is σ = 294758460. Its totient is φ = 52401472.

The previous prime is 131003713. The next prime is 131003729. The reversal of 131003720 is 27300131.

It can be written as a sum of positive squares in 2 ways, for example, as 124233316 + 6770404 = 11146^2 + 2602^2 .

It is not an unprimeable number, because it can be changed into a prime (131003729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1637507 + ... + 1637586.

Almost surely, 2^131003720 is an apocalyptic number.

131003720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131003720 is an abundant number, since it is smaller than the sum of its proper divisors (163754740).

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

131003720 is a wasteful number, since it uses less digits than its factorization.

131003720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3275104 (or 3275100 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 131003720 is about 11445.6856500605. The cubic root of 131003720 is about 507.8801151371.

Adding to 131003720 its reverse (27300131), we get a palindrome (158303851).

The spelling of 131003720 in words is "one hundred thirty-one million, three thousand, seven hundred twenty".