521224364 has 6 divisors (see below), whose sum is σ = 912142644. Its totient is φ = 260612180.

The previous prime is 521224343. The next prime is 521224387. The reversal of 521224364 is 463422125.

It is a super-3 number, since 3×521224364³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65153042 + ... + 65153049.

It is an arithmetic number, because the mean of its divisors is an integer number (152023774).

Almost surely, 2^521224364 is an apocalyptic number.

It is an amenable number.

521224364 is a deficient number, since it is larger than the sum of its proper divisors (390918280).

521224364 is a wasteful number, since it uses less digits than its factorization.

521224364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130306095 (or 130306093 counting only the distinct ones).

The product of its digits is 11520, while the sum is 29.

The square root of 521224364 is about 22830.3386746671. The cubic root of 521224364 is about 804.7757893127.

Adding to 521224364 its reverse (463422125), we get a palindrome (984646489).

The spelling of 521224364 in words is "five hundred twenty-one million, two hundred twenty-four thousand, three hundred sixty-four".