505251255450 has 48 divisors (see below), whose sum is σ = 1264733650080. Its totient is φ = 133474470720.

The previous prime is 505251255433. The next prime is 505251255461. The reversal of 505251255450 is 54552152505.

It is a super-2 number, since 2×505251255450² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 505251255399 and 505251255408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15723865 + ... + 15755964.

It is an arithmetic number, because the mean of its divisors is an integer number (26348617710).

Almost surely, 2^505251255450 is an apocalyptic number.

505251255450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

505251255450 is an abundant number, since it is smaller than the sum of its proper divisors (759482394630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505251255450 is a wasteful number, since it uses less digits than its factorization.

505251255450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31479951 (or 31479946 counting only the distinct ones).

The product of its (nonzero) digits is 250000, while the sum is 39.

The spelling of 505251255450 in words is "five hundred five billion, two hundred fifty-one million, two hundred fifty-five thousand, four hundred fifty".