133012511 has 4 divisors (see below), whose sum is σ = 134383872. Its totient is φ = 131641152.

The previous prime is 133012489. The next prime is 133012541. The reversal of 133012511 is 115210331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 115210331 = 1493 ⋅77167.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133012511 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133012511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133012541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685535 + ... + 685728.

It is an arithmetic number, because the mean of its divisors is an integer number (33595968).

Almost surely, 2^133012511 is an apocalyptic number.

133012511 is a deficient number, since it is larger than the sum of its proper divisors (1371361).

133012511 is an equidigital number, since it uses as much as digits as its factorization.

133012511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371360.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 133012511 is about 11533.1050025568. The cubic root of 133012511 is about 510.4628772141.

Adding to 133012511 its reverse (115210331), we get a palindrome (248222842).

The spelling of 133012511 in words is "one hundred thirty-three million, twelve thousand, five hundred eleven".