131780501 has 8 divisors (see below), whose sum is σ = 138309120. Its totient is φ = 125318512.

The previous prime is 131780497. The next prime is 131780503. The reversal of 131780501 is 105087131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131780501 - 2² = 131780497 is a prime.

It is a super-2 number, since 2×131780501² = 34732200887622002, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131780503) 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, 12581 + ... + 20538.

It is an arithmetic number, because the mean of its divisors is an integer number (17288640).

Almost surely, 2^131780501 is an apocalyptic number.

It is an amenable number.

131780501 is a deficient number, since it is larger than the sum of its proper divisors (6528619).

131780501 is a wasteful number, since it uses less digits than its factorization.

131780501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33315.

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 131780501 is about 11479.5688507888. The cubic root of 131780501 is about 508.8819554807.

It can be divided in two parts, 1317 and 80501, that added together give a palindrome (81818).

The spelling of 131780501 in words is "one hundred thirty-one million, seven hundred eighty thousand, five hundred one".