133355554 has 4 divisors (see below), whose sum is σ = 200033334. Its totient is φ = 66677776.

The previous prime is 133355533. The next prime is 133355557. The reversal of 133355554 is 455553331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 127080529 + 6275025 = 11273^2 + 2505^2 .

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 as a sum of consecutive naturals, namely, 33338887 + ... + 33338890.

Almost surely, 2^133355554 is an apocalyptic number.

133355554 is a deficient number, since it is larger than the sum of its proper divisors (66677780).

133355554 is an equidigital number, since it uses as much as digits as its factorization.

133355554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66677779.

The product of its digits is 67500, while the sum is 34.

The square root of 133355554 is about 11547.9675267988. The cubic root of 133355554 is about 510.9013331967.

The spelling of 133355554 in words is "one hundred thirty-three million, three hundred fifty-five thousand, five hundred fifty-four".