205501252724531 has 2 divisors, whose sum is σ = 205501252724532. Its totient is φ = 205501252724530.

The previous prime is 205501252724497. The next prime is 205501252724623. The reversal of 205501252724531 is 135427252105502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205501252724531 is a prime.

It is a super-2 number, since 2×205501252724531² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (205501252724731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102750626362265 + 102750626362266.

It is an arithmetic number, because the mean of its divisors is an integer number (102750626362266).

Almost surely, 2^{205501252724531} is an apocalyptic number.

205501252724531 is a deficient number, since it is larger than the sum of its proper divisors (1).

205501252724531 is an equidigital number, since it uses as much as digits as its factorization.

205501252724531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840000, while the sum is 44.

The spelling of 205501252724531 in words is "two hundred five trillion, five hundred one billion, two hundred fifty-two million, seven hundred twenty-four thousand, five hundred thirty-one".