133445555 has 16 divisors (see below), whose sum is σ = 164296704. Its totient is φ = 103995360.

The previous prime is 133445509. The next prime is 133445567. The reversal of 133445555 is 555544331.

It is not a de Polignac number, because 133445555 - 2²² = 129251251 is a prime.

It is a super-2 number, since 2×133445555² = 35615432298516050, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122222 + ... + 123308.

It is an arithmetic number, because the mean of its divisors is an integer number (10268544).

Almost surely, 2^133445555 is an apocalyptic number.

133445555 is a deficient number, since it is larger than the sum of its proper divisors (30851149).

133445555 is a wasteful number, since it uses less digits than its factorization.

133445555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706.

The product of its digits is 90000, while the sum is 35.

The square root of 133445555 is about 11551.8637024508. The cubic root of 133445555 is about 511.0162422728.

Adding to 133445555 its reverse (555544331), we get a palindrome (688989886).

The spelling of 133445555 in words is "one hundred thirty-three million, four hundred forty-five thousand, five hundred fifty-five".