505212156497 has 2 divisors, whose sum is σ = 505212156498. Its totient is φ = 505212156496.

The previous prime is 505212156487. The next prime is 505212156523. The reversal of 505212156497 is 794651212505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 493648165201 + 11563991296 = 702601^2 + 107536^2 .

It is a cyclic number.

It is not a de Polignac number, because 505212156497 - 2¹⁰ = 505212155473 is a prime.

It is a super-2 number, since 2×505212156497² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (505212156487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252606078248 + 252606078249.

It is an arithmetic number, because the mean of its divisors is an integer number (252606078249).

Almost surely, 2^505212156497 is an apocalyptic number.

It is an amenable number.

505212156497 is a deficient number, since it is larger than the sum of its proper divisors (1).

505212156497 is an equidigital number, since it uses as much as digits as its factorization.

505212156497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756000, while the sum is 47.

The spelling of 505212156497 in words is "five hundred five billion, two hundred twelve million, one hundred fifty-six thousand, four hundred ninety-seven".