501505531 has 2 divisors, whose sum is σ = 501505532. Its totient is φ = 501505530.

The previous prime is 501505489. The next prime is 501505573. The reversal of 501505531 is 135505105.

It is a balanced prime because it is at equal distance from previous prime (501505489) and next prime (501505573).

It is a cyclic number.

It is not a de Polignac number, because 501505531 - 2¹⁷ = 501374459 is a prime.

It is a super-2 number, since 2×501505531² = 503015595247183922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 501505496 and 501505505.

It is not a weakly prime, because it can be changed into another prime (501505591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250752765 + 250752766.

It is an arithmetic number, because the mean of its divisors is an integer number (250752766).

Almost surely, 2^501505531 is an apocalyptic number.

501505531 is a deficient number, since it is larger than the sum of its proper divisors (1).

501505531 is an equidigital number, since it uses as much as digits as its factorization.

501505531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1875, while the sum is 25.

The square root of 501505531 is about 22394.3191680390. The cubic root of 501505531 is about 794.4963549187.

The spelling of 501505531 in words is "five hundred one million, five hundred five thousand, five hundred thirty-one".