505721146 has 16 divisors (see below), whose sum is σ = 869374080. Its totient is φ = 216131760.

The previous prime is 505721137. The next prime is 505721189. The reversal of 505721146 is 641127505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45285 + ... + 55336.

It is an arithmetic number, because the mean of its divisors is an integer number (54335880).

Almost surely, 2^505721146 is an apocalyptic number.

505721146 is a deficient number, since it is larger than the sum of its proper divisors (363652934).

505721146 is a wasteful number, since it uses less digits than its factorization.

505721146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100989.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 505721146 is about 22488.2446180221. The cubic root of 505721146 is about 796.7163036557.

The spelling of 505721146 in words is "five hundred five million, seven hundred twenty-one thousand, one hundred forty-six".