133443420 has 48 divisors (see below), whose sum is σ = 407611008. Its totient is φ = 32349760.

The previous prime is 133443407. The next prime is 133443433. The reversal of 133443420 is 24344331.

It is an interprime number because it is at equal distance from previous prime (133443407) and next prime (133443433).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100434 + ... + 101753.

It is an arithmetic number, because the mean of its divisors is an integer number (8491896).

Almost surely, 2^133443420 is an apocalyptic number.

133443420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133443420 is an abundant number, since it is smaller than the sum of its proper divisors (274167588).

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

133443420 is a wasteful number, since it uses less digits than its factorization.

133443420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202210 (or 202208 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 133443420 is about 11551.7712927499. The cubic root of 133443420 is about 511.0135170029.

Adding to 133443420 its reverse (24344331), we get a palindrome (157787751).

The spelling of 133443420 in words is "one hundred thirty-three million, four hundred forty-three thousand, four hundred twenty".