506625881 has 2 divisors, whose sum is σ = 506625882. Its totient is φ = 506625880.

The previous prime is 506625877. The next prime is 506625883. The reversal of 506625881 is 188526605.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 373107856 + 133518025 = 19316^2 + 11555^2 .

It is a cyclic number.

It is not a de Polignac number, because 506625881 - 2² = 506625877 is a prime.

It is a super-2 number, since 2×506625881² = 513339566598052322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 506625883, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (506625883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253312940 + 253312941.

It is an arithmetic number, because the mean of its divisors is an integer number (253312941).

Almost surely, 2^506625881 is an apocalyptic number.

It is an amenable number.

506625881 is a deficient number, since it is larger than the sum of its proper divisors (1).

506625881 is an equidigital number, since it uses as much as digits as its factorization.

506625881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 506625881 is about 22508.3513612170. The cubic root of 506625881 is about 797.1911290347.

The spelling of 506625881 in words is "five hundred six million, six hundred twenty-five thousand, eight hundred eighty-one".