521357054 has 16 divisors (see below), whose sum is σ = 864040608. Its totient is φ = 234676992.

The previous prime is 521357009. The next prime is 521357119. The reversal of 521357054 is 450753125.

It is a self number, because there is not a number n which added to its sum of digits gives 521357054.

It is a congruent number.

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, 332567 + ... + 334130.

It is an arithmetic number, because the mean of its divisors is an integer number (54002538).

Almost surely, 2^521357054 is an apocalyptic number.

521357054 is a deficient number, since it is larger than the sum of its proper divisors (342683554).

521357054 is a wasteful number, since it uses less digits than its factorization.

521357054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666739.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 521357054 is about 22833.2444913113. The cubic root of 521357054 is about 804.8440750943.

The spelling of 521357054 in words is "five hundred twenty-one million, three hundred fifty-seven thousand, fifty-four".