133511427 has 18 divisors (see below), whose sum is σ = 224336268. Its totient is φ = 76291992.

The previous prime is 133511419. The next prime is 133511437. The reversal of 133511427 is 724115331.

It is not a de Polignac number, because 133511427 - 2³ = 133511419 is a prime.

It is a super-2 number, since 2×133511427² = 35650602279152658, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 133511427.

It is not an unprimeable number, because it can be changed into a prime (133511437) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 150933 + ... + 151814.

It is an arithmetic number, because the mean of its divisors is an integer number (12463126).

Almost surely, 2^133511427 is an apocalyptic number.

133511427 is a deficient number, since it is larger than the sum of its proper divisors (90824841).

133511427 is a wasteful number, since it uses less digits than its factorization.

133511427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302767 (or 302757 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 133511427 is about 11554.7144923620. The cubic root of 133511427 is about 511.1003118264.

Adding to 133511427 its reverse (724115331), we get a palindrome (857626758).

The spelling of 133511427 in words is "one hundred thirty-three million, five hundred eleven thousand, four hundred twenty-seven".