500661131 has 2 divisors, whose sum is σ = 500661132. Its totient is φ = 500661130.

The previous prime is 500661103. The next prime is 500661137. The reversal of 500661131 is 131166005.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-500661131 is a prime.

It is a super-2 number, since 2×500661131² = 501323136188398322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 500661097 and 500661106.

It is not a weakly prime, because it can be changed into another prime (500661137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250330565 + 250330566.

It is an arithmetic number, because the mean of its divisors is an integer number (250330566).

Almost surely, 2^500661131 is an apocalyptic number.

500661131 is a deficient number, since it is larger than the sum of its proper divisors (1).

500661131 is an equidigital number, since it uses as much as digits as its factorization.

500661131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 500661131 is about 22375.4582299447. The cubic root of 500661131 is about 794.0501985914.

The spelling of 500661131 in words is "five hundred million, six hundred sixty-one thousand, one hundred thirty-one".