506625381 has 24 divisors (see below), whose sum is σ = 797315840. Its totient is φ = 317877696.

The previous prime is 506625373. The next prime is 506625407. The reversal of 506625381 is 183526605.

It is not a de Polignac number, because 506625381 - 2³ = 506625373 is a prime.

It is a super-2 number, since 2×506625381² = 513338553346790322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506625881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24661 + ... + 40266.

Almost surely, 2^506625381 is an apocalyptic number.

506625381 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

506625381 is a deficient number, since it is larger than the sum of its proper divisors (290690459).

506625381 is a wasteful number, since it uses less digits than its factorization.

506625381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64970 (or 64947 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 506625381 is about 22508.3402542258. The cubic root of 506625381 is about 797.1908667796.

The spelling of 506625381 in words is "five hundred six million, six hundred twenty-five thousand, three hundred eighty-one".