15780133 has 2 divisors, whose sum is σ = 15780134. Its totient is φ = 15780132.

The previous prime is 15780113. The next prime is 15780157. The reversal of 15780133 is 33108751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8392609 + 7387524 = 2897^2 + 2718^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15780133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15780113) 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, 7890066 + 7890067.

It is an arithmetic number, because the mean of its divisors is an integer number (7890067).

Almost surely, 2^15780133 is an apocalyptic number.

It is an amenable number.

15780133 is a deficient number, since it is larger than the sum of its proper divisors (1).

15780133 is an equidigital number, since it uses as much as digits as its factorization.

15780133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 15780133 is about 3972.4215536622. The cubic root of 15780133 is about 250.8246528001.

Adding to 15780133 its reverse (33108751), we get a palindrome (48888884).

The spelling of 15780133 in words is "fifteen million, seven hundred eighty thousand, one hundred thirty-three".