133355550 has 24 divisors (see below), whose sum is σ = 330722136. Its totient is φ = 35561440.

The previous prime is 133355533. The next prime is 133355557. The reversal of 133355550 is 55553331.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133355557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 444369 + ... + 444668.

It is an arithmetic number, because the mean of its divisors is an integer number (13780089).

Almost surely, 2^133355550 is an apocalyptic number.

133355550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133355550 is an abundant number, since it is smaller than the sum of its proper divisors (197366586).

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

133355550 is a wasteful number, since it uses less digits than its factorization.

133355550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889052 (or 889047 counting only the distinct ones).

The product of its (nonzero) digits is 16875, while the sum is 30.

The square root of 133355550 is about 11547.9673536082. The cubic root of 133355550 is about 510.9013280886.

The spelling of 133355550 in words is "one hundred thirty-three million, three hundred fifty-five thousand, five hundred fifty".