505312449251 has 8 divisors (see below), whose sum is σ = 520168102944. Its totient is φ = 490519877760.

The previous prime is 505312449217. The next prime is 505312449253. The reversal of 505312449251 is 152944213505.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 505312449251 - 2²⁶ = 505245340387 is a prime.

It is a super-2 number, since 2×505312449251² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 505312449199 and 505312449208.

It is not an unprimeable number, because it can be changed into a prime (505312449253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15754295 + ... + 15786336.

It is an arithmetic number, because the mean of its divisors is an integer number (65021012868).

Almost surely, 2^505312449251 is an apocalyptic number.

505312449251 is a deficient number, since it is larger than the sum of its proper divisors (14855653693).

505312449251 is a wasteful number, since it uses less digits than its factorization.

505312449251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31541101.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 505312449251 in words is "five hundred five billion, three hundred twelve million, four hundred forty-nine thousand, two hundred fifty-one".