522121020 has 96 divisors (see below), whose sum is σ = 1503738432. Its totient is φ = 135303168.

The previous prime is 522120947. The next prime is 522121043. The reversal of 522121020 is 20121225.

It is a super-2 number, since 2×522121020² = 545220719051680800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 358614 + ... + 360066.

It is an arithmetic number, because the mean of its divisors is an integer number (15663942).

Almost surely, 2^522121020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 522121020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (751869216).

522121020 is an abundant number, since it is smaller than the sum of its proper divisors (981617412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

522121020 is a wasteful number, since it uses less digits than its factorization.

522121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631 (or 1629 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 522121020 is about 22849.9676148567. The cubic root of 522121020 is about 805.2370069728.

Adding to 522121020 its reverse (20121225), we get a palindrome (542242245).

The spelling of 522121020 in words is "five hundred twenty-two million, one hundred twenty-one thousand, twenty".