151521133 has 4 divisors (see below), whose sum is σ = 154005148. Its totient is φ = 149037120.

The previous prime is 151521113. The next prime is 151521151. The reversal of 151521133 is 331125151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331125151 = 7 ⋅47303593.

It can be written as a sum of positive squares in 2 ways, for example, as 78623689 + 72897444 = 8867^2 + 8538^2 .

It is a cyclic number.

It is not a de Polignac number, because 151521133 - 2¹³ = 151512941 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 (151521113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1241916 + ... + 1242037.

It is an arithmetic number, because the mean of its divisors is an integer number (38501287).

Almost surely, 2^151521133 is an apocalyptic number.

It is an amenable number.

151521133 is a deficient number, since it is larger than the sum of its proper divisors (2484015).

151521133 is an equidigital number, since it uses as much as digits as its factorization.

151521133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484014.

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

The square root of 151521133 is about 12309.3920645985. The cubic root of 151521133 is about 533.1192974051.

Adding to 151521133 its reverse (331125151), we get a palindrome (482646284).

It can be divided in two parts, 151 and 521133, that added together give a square (521284 = 722²).

The spelling of 151521133 in words is "one hundred fifty-one million, five hundred twenty-one thousand, one hundred thirty-three".