133051220 has 24 divisors (see below), whose sum is σ = 281193864. Its totient is φ = 52880256.

The previous prime is 133051211. The next prime is 133051229. The reversal of 133051220 is 22150331.

It is an interprime number because it is at equal distance from previous prime (133051211) and next prime (133051229).

It can be written as a sum of positive squares in 4 ways, for example, as 432964 + 132618256 = 658^2 + 11516^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133051229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18047 + ... + 24326.

It is an arithmetic number, because the mean of its divisors is an integer number (11716411).

Almost surely, 2^133051220 is an apocalyptic number.

133051220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133051220 is an abundant number, since it is smaller than the sum of its proper divisors (148142644).

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

133051220 is a wasteful number, since it uses less digits than its factorization.

133051220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42539 (or 42537 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 133051220 is about 11534.7830495419. The cubic root of 133051220 is about 510.5123903286.

The spelling of 133051220 in words is "one hundred thirty-three million, fifty-one thousand, two hundred twenty".