133522020 has 60 divisors (see below), whose sum is σ = 418868604. Its totient is φ = 35605440.

The previous prime is 133522019. The next prime is 133522021. The reversal of 133522020 is 20225331.

It is an interprime number because it is at equal distance from previous prime (133522019) and next prime (133522021).

It can be written as a sum of positive squares in 2 ways, for example, as 96943716 + 36578304 = 9846^2 + 6048^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 133521984 and 133522002.

It is not an unprimeable number, because it can be changed into a prime (133522021) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 39591 + ... + 42830.

Almost surely, 2^133522020 is an apocalyptic number.

133522020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133522020 is an abundant number, since it is smaller than the sum of its proper divisors (285346584).

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

133522020 is a wasteful number, since it uses less digits than its factorization.

133522020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82442 (or 82431 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 133522020 is about 11555.1728675948. The cubic root of 133522020 is about 511.1138286280.

Adding to 133522020 its reverse (20225331), we get a palindrome (153747351).

The spelling of 133522020 in words is "one hundred thirty-three million, five hundred twenty-two thousand, twenty".