153131434 has 4 divisors (see below), whose sum is σ = 229697154. Its totient is φ = 76565716.

The previous prime is 153131423. The next prime is 153131437. The reversal of 153131434 is 434131351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 434131351 = 1489 ⋅291559.

It can be written as a sum of positive squares in only one way, i.e., 142730809 + 10400625 = 11947^2 + 3225^2 .

It is a junction number, because it is equal to n+sod(n) for n = 153131399 and 153131408.

It is not an unprimeable number, because it can be changed into a prime (153131437) 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 as a sum of consecutive naturals, namely, 38282857 + ... + 38282860.

Almost surely, 2^153131434 is an apocalyptic number.

153131434 is a deficient number, since it is larger than the sum of its proper divisors (76565720).

153131434 is an equidigital number, since it uses as much as digits as its factorization.

153131434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76565719.

The product of its digits is 2160, while the sum is 25.

The square root of 153131434 is about 12374.6286408926. The cubic root of 153131434 is about 535.0012332926.

Adding to 153131434 its reverse (434131351), we get a palindrome (587262785).

The spelling of 153131434 in words is "one hundred fifty-three million, one hundred thirty-one thousand, four hundred thirty-four".