501155131 has 2 divisors, whose sum is σ = 501155132. Its totient is φ = 501155130.

The previous prime is 501155129. The next prime is 501155231. The reversal of 501155131 is 131551105.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 501155131 - 2¹ = 501155129 is a prime.

It is a super-2 number, since 2×501155131² = 502312930655254322, which contains 22 as substring.

Together with 501155129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (501155101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250577565 + 250577566.

It is an arithmetic number, because the mean of its divisors is an integer number (250577566).

Almost surely, 2^501155131 is an apocalyptic number.

501155131 is a deficient number, since it is larger than the sum of its proper divisors (1).

501155131 is an equidigital number, since it uses as much as digits as its factorization.

501155131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 375, while the sum is 22.

The square root of 501155131 is about 22386.4943883584. The cubic root of 501155131 is about 794.3112746170.

The spelling of 501155131 in words is "five hundred one million, one hundred fifty-five thousand, one hundred thirty-one".