505181138 has 32 divisors (see below), whose sum is σ = 960259968. Its totient is φ = 193593600.

The previous prime is 505181119. The next prime is 505181143. The reversal of 505181138 is 831181505.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17495 + ... + 36282.

It is an arithmetic number, because the mean of its divisors is an integer number (30008124).

Almost surely, 2^505181138 is an apocalyptic number.

505181138 is a deficient number, since it is larger than the sum of its proper divisors (455078830).

505181138 is a wasteful number, since it uses less digits than its factorization.

505181138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53858.

The product of its (nonzero) digits is 4800, while the sum is 32.

The square root of 505181138 is about 22476.2349605088. The cubic root of 505181138 is about 796.4326253177.

The spelling of 505181138 in words is "five hundred five million, one hundred eighty-one thousand, one hundred thirty-eight".