133521151 has 16 divisors (see below), whose sum is σ = 145411200. Its totient is φ = 122192928.

The previous prime is 133521119. The next prime is 133521163. The reversal of 133521151 is 151125331.

It is a cyclic number.

It is not a de Polignac number, because 133521151 - 2⁵ = 133521119 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 (133561151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66480 + ... + 68458.

It is an arithmetic number, because the mean of its divisors is an integer number (9088200).

Almost surely, 2^133521151 is an apocalyptic number.

133521151 is a deficient number, since it is larger than the sum of its proper divisors (11890049).

133521151 is a wasteful number, since it uses less digits than its factorization.

133521151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118.

The product of its digits is 450, while the sum is 22.

The square root of 133521151 is about 11555.1352653268. The cubic root of 133521151 is about 511.1127197999.

Adding to 133521151 its reverse (151125331), we get a palindrome (284646482).

It can be divided in two parts, 133 and 521151, that added together give a square (521284 = 722²).

The spelling of 133521151 in words is "one hundred thirty-three million, five hundred twenty-one thousand, one hundred fifty-one".