520222646 has 4 divisors (see below), whose sum is σ = 780333972. Its totient is φ = 260111322.

The previous prime is 520222567. The next prime is 520222721. The reversal of 520222646 is 646222025.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×520222646³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130055660 + ... + 130055663.

It is an arithmetic number, because the mean of its divisors is an integer number (195083493).

Almost surely, 2^520222646 is an apocalyptic number.

520222646 is a deficient number, since it is larger than the sum of its proper divisors (260111326).

520222646 is a wasteful number, since it uses less digits than its factorization.

520222646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260111325.

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

The square root of 520222646 is about 22808.3898160304. The cubic root of 520222646 is about 804.2599043811.

The spelling of 520222646 in words is "five hundred twenty million, two hundred twenty-two thousand, six hundred forty-six".