133138351 has 4 divisors (see below), whose sum is σ = 133874104. Its totient is φ = 132402600.

The previous prime is 133138337. The next prime is 133138387. The reversal of 133138351 is 153831331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 153831331 = 31 ⋅4962301.

It is a cyclic number.

It is not a de Polignac number, because 133138351 - 2¹⁷ = 133007279 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 (133138331) 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, 367605 + ... + 367966.

It is an arithmetic number, because the mean of its divisors is an integer number (33468526).

Almost surely, 2^133138351 is an apocalyptic number.

133138351 is a deficient number, since it is larger than the sum of its proper divisors (735753).

133138351 is an equidigital number, since it uses as much as digits as its factorization.

133138351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735752.

The product of its digits is 3240, while the sum is 28.

The square root of 133138351 is about 11538.5593121498. The cubic root of 133138351 is about 510.6238054382.

Adding to 133138351 its reverse (153831331), we get a palindrome (286969682).

The spelling of 133138351 in words is "one hundred thirty-three million, one hundred thirty-eight thousand, three hundred fifty-one".