521323148 has 12 divisors (see below), whose sum is σ = 912595992. Its totient is φ = 260581440.

The previous prime is 521323093. The next prime is 521323151. The reversal of 521323148 is 841323125.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 521323148.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3965 + ... + 32532.

It is an arithmetic number, because the mean of its divisors is an integer number (76049666).

Almost surely, 2^521323148 is an apocalyptic number.

It is an amenable number.

521323148 is a deficient number, since it is larger than the sum of its proper divisors (391272844).

521323148 is a wasteful number, since it uses less digits than its factorization.

521323148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40072 (or 40070 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 521323148 is about 22832.5020091973. The cubic root of 521323148 is about 804.8266272726.

The spelling of 521323148 in words is "five hundred twenty-one million, three hundred twenty-three thousand, one hundred forty-eight".