133121416 has 8 divisors (see below), whose sum is σ = 249602670. Its totient is φ = 66560704.

The previous prime is 133121389. The next prime is 133121431. The reversal of 133121416 is 614121331.

It can be written as a sum of positive squares in only one way, i.e., 67996516 + 65124900 = 8246^2 + 8070^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×133121416² = 35442622795690112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8320081 + ... + 8320096.

Almost surely, 2^133121416 is an apocalyptic number.

It is an amenable number.

133121416 is a deficient number, since it is larger than the sum of its proper divisors (116481254).

133121416 is a wasteful number, since it uses less digits than its factorization.

133121416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16640183 (or 16640179 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 133121416 is about 11537.8254450308. The cubic root of 133121416 is about 510.6021543243.

Adding to 133121416 its reverse (614121331), we get a palindrome (747242747).

The spelling of 133121416 in words is "one hundred thirty-three million, one hundred twenty-one thousand, four hundred sixteen".