133801751 has 4 divisors (see below), whose sum is σ = 135029400. Its totient is φ = 132574104.

The previous prime is 133801709. The next prime is 133801753. The reversal of 133801751 is 157108331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 157108331 = 23 ⋅6830797.

It is a cyclic number.

It is not a de Polignac number, because 133801751 - 2⁶ = 133801687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133801753) 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, 613661 + ... + 613878.

It is an arithmetic number, because the mean of its divisors is an integer number (33757350).

Almost surely, 2^133801751 is an apocalyptic number.

133801751 is a deficient number, since it is larger than the sum of its proper divisors (1227649).

133801751 is a wasteful number, since it uses less digits than its factorization.

133801751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227648.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 133801751 is about 11567.2706806748. The cubic root of 133801751 is about 511.4705105042.

The spelling of 133801751 in words is "one hundred thirty-three million, eight hundred one thousand, seven hundred fifty-one".