522121356 has 96 divisors (see below), whose sum is σ = 1399500480. Its totient is φ = 168210432.

The previous prime is 522121333. The next prime is 522121361. The reversal of 522121356 is 653121225.

It is a happy number.

522121356 is a `hidden beast` number, since 522 + 1 + 2 + 135 + 6 = 666.

It is a super-2 number, since 2×522121356² = 545221420782557472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 770890 + ... + 771566.

It is an arithmetic number, because the mean of its divisors is an integer number (14578130).

Almost surely, 2^522121356 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 522121356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (699750240).

522121356 is an abundant number, since it is smaller than the sum of its proper divisors (877379124).

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

522121356 is a wasteful number, since it uses less digits than its factorization.

522121356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920 (or 912 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 522121356 is about 22849.9749671635. The cubic root of 522121356 is about 805.2371797038.

The spelling of 522121356 in words is "five hundred twenty-two million, one hundred twenty-one thousand, three hundred fifty-six".